841 lines
32 KiB
JSON
841 lines
32 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-20004",
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"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
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"state": "PUBLISHED",
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"assignerShortName": "cisco",
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"dateReserved": "2025-10-08T11:59:15.349Z",
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"datePublished": "2026-03-25T16:04:48.379Z",
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"dateUpdated": "2026-03-26T17:38:43.815Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
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"shortName": "cisco",
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"dateUpdated": "2026-03-25T16:04:48.379Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "A vulnerability in the TLS library of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to exhaust the available memory of an affected device.\r\n\r This vulnerability is due to improper management of memory resources during TLS connection setup. An attacker could exploit this vulnerability by repeatedly triggering the conditions that cause the memory increase. This could be done in a variety of ways, such as by repeatedly attempting Extensible Authentication Protocol (EAP) authentication when local EAP is enabled on an affected device or by using a machine-in-the-middle attack and resetting TLS connections between the affected device and other devices. A successful exploit could allow the attacker to exhaust the available memory on an affected device, resulting in an unexpected reload and a denial of service (DoS) condition."
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}
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],
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"affected": [
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{
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"vendor": "Cisco",
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"product": "Cisco IOS XE Software",
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"versions": [
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{
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"version": "16.9.1",
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"status": "affected"
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},
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{
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"version": "16.9.2",
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"status": "affected"
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},
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{
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"version": "16.9.1a",
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"status": "affected"
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},
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{
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"version": "16.9.1b",
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"status": "affected"
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{
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"version": "16.9.1s",
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"status": "affected"
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{
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"version": "16.9.3",
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{
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"version": "16.9.4",
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"status": "affected"
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{
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"version": "16.9.3a",
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"status": "affected"
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{
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"version": "16.9.7",
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"version": "16.9.8",
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{
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"version": "16.10.1",
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"status": "affected"
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{
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"version": "16.10.1a",
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"status": "affected"
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"version": "16.10.1b",
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"version": "16.10.1s",
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"version": "16.10.1e",
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"version": "16.10.1d",
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"version": "16.10.1f",
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"version": "16.11.1",
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{
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"version": "16.11.1a",
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{
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"version": "16.11.1b",
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{
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"version": "16.11.2",
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"version": "16.11.1s",
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"status": "affected"
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"status": "affected"
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"version": "16.12.1c",
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"status": "affected"
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"version": "16.12.1y",
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"status": "affected"
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{
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"version": "16.12.2a",
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"status": "affected"
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{
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"version": "16.12.3",
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"status": "affected"
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{
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"version": "16.12.8",
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"status": "affected"
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{
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"version": "16.12.2s",
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"status": "affected"
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{
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"version": "16.12.1x",
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"version": "16.12.1t",
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"status": "affected"
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{
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"version": "16.12.4",
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"status": "affected"
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"version": "16.12.3s",
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"status": "affected"
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"status": "affected"
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"version": "16.12.4a",
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"status": "affected"
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{
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"version": "16.12.5",
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"status": "affected"
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{
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"version": "16.12.6",
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"status": "affected"
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{
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"version": "16.12.1z1",
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"status": "affected"
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"status": "affected"
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"version": "16.12.11",
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{
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"version": "16.12.12",
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"status": "affected"
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{
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"version": "16.12.13",
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"status": "affected"
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{
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"version": "16.12.14",
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"status": "affected"
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{
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"version": "16.12.15",
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{
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"version": "17.1.1",
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{
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"status": "affected"
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{
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{
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"version": "17.2.1r",
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{
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{
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{
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{
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"version": "17.3.1",
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{
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"version": "17.3.2",
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{
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"version": "17.3.3",
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{
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{
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{
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"version": "17.3.1x",
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{
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"version": "17.3.1z",
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{
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"version": "17.3.4",
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{
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{
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{
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},
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{
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{
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"version": "17.3.4c",
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{
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"version": "17.3.5a",
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{
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"version": "17.3.5b",
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"status": "affected"
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{
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"status": "affected"
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{
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"status": "affected"
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{
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{
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{
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{
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"status": "affected"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"status": "affected"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"status": "affected"
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{
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{
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"status": "affected"
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{
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},
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{
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"status": "affected"
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},
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{
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"status": "affected"
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{
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"status": "affected"
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},
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{
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"version": "17.9.6",
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"status": "affected"
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},
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{
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"version": "17.9.6a",
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"status": "affected"
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{
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{
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{
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},
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{
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"status": "affected"
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},
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{
|
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"version": "17.12.1",
|
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"status": "affected"
|
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},
|
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{
|
|
"version": "17.12.1w",
|
|
"status": "affected"
|
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},
|
|
{
|
|
"version": "17.12.1a",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.1x",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.2",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.3",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.2a",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.1y",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.1z",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.4",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.3a",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.1z1",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.1z2",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.4a",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.4b",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.1z3",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.1z4",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.1z5",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.12.1z6",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.13.1",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.13.1a",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.14.1",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.14.1a",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.15.1",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.15.1w",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.15.1a",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.15.1b",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.15.1x",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.15.1z",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.15.1y",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.16.1",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "17.16.1a",
|
|
"status": "affected"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"description": "Missing Reference to Active Allocated Resource",
|
|
"type": "cwe",
|
|
"cweId": "CWE-771"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-tls-dos-TVgLDEZL",
|
|
"name": "cisco-sa-iosxe-tls-dos-TVgLDEZL"
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"format": "cvssV3_1",
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
|
|
"baseScore": 7.4,
|
|
"baseSeverity": "HIGH",
|
|
"attackVector": "ADJACENT_NETWORK",
|
|
"attackComplexity": "LOW",
|
|
"privilegesRequired": "NONE",
|
|
"userInteraction": "NONE",
|
|
"scope": "CHANGED",
|
|
"confidentialityImpact": "NONE",
|
|
"integrityImpact": "NONE",
|
|
"availabilityImpact": "HIGH"
|
|
}
|
|
}
|
|
],
|
|
"exploits": [
|
|
{
|
|
"lang": "en",
|
|
"value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
|
|
}
|
|
],
|
|
"source": {
|
|
"advisory": "cisco-sa-iosxe-tls-dos-TVgLDEZL",
|
|
"discovery": "EXTERNAL",
|
|
"defects": [
|
|
"CSCwm80596",
|
|
"CSCwk59707"
|
|
]
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2026-03-26T17:38:35.255782Z",
|
|
"id": "CVE-2026-20004",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"role": "CISA Coordinator",
|
|
"version": "2.0.3"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-03-26T17:38:43.815Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |