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vuln-cve/data/2026/63xxx/CVE-2026-63201.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-63201",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-07-15T22:19:06.905Z",
"datePublished": "2026-10-30T22:03:18.551Z",
"dateUpdated": "2026-11-02T18:08:38.871Z"
},
"containers": {
"cna": {
"title": "netopeer2-server logging has format string vulnerability via subtree filter",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-134",
"lang": "en",
"description": "CWE-134: Use of Externally-Controlled Format String",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/CESNET/netopeer2/security/advisories/GHSA-25gm-4x89-7r2q",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/CESNET/netopeer2/security/advisories/GHSA-25gm-4x89-7r2q"
},
{
"name": "https://github.com/CESNET/netopeer2/commit/e98beb2d4d8cc82875208bccb8e1348a8e9e95b3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/CESNET/netopeer2/commit/e98beb2d4d8cc82875208bccb8e1348a8e9e95b3"
},
{
"name": "https://github.com/CESNET/netopeer2/releases/tag/2.8.21",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/CESNET/netopeer2/releases/tag/2.8.21"
}
],
"affected": [
{
"vendor": "CESNET",
"product": "netopeer2",
"versions": [
{
"version": "< 2.8.21",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-10-30T22:03:18.551Z"
},
"descriptions": [
{
"lang": "en",
"value": "Netopeer2 is a server for implementing network configuration management based on the `NETCONF` Protocol. In affected versions, a low-privileged authenticated `NETCONF` user can remotely crash `netopeer2-server` by sending a `get RPC` with an invalid `subtree filter` whose text contains format specifiers. In `src/netconf.c`, `np2srv_rpc_get_cb()` sends the invalid value through `ERR()` to `np2log_printf()`, where `vsnprintf()` first formats the message safely. In `src/log.c`, that already formatted buffer is subsequently passed to `np2log()` as the format string itself, causing `vsyslog()` to interpret attacker-controlled percent sequences and read invalid pointer arguments. The reported denial of service was confirmed on version 2.8.7 using `NETCONF`-over-SSH and AddressSanitizer; reliable remote code execution was not confirmed. `The advisory identifies 2.8.8 as patched`; repository comparisons verify the fix in public release 2.8.21. The affected/fixed boundary remains unresolved because no public 2.8.8 tag was located, which does not establish the status of an untagged 2.8.8 build."
}
],
"source": {
"advisory": "GHSA-25gm-4x89-7r2q",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-11-02T17:03:24.936130Z",
"id": "CVE-2026-63201",
"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": "2026-11-02T18:08:38.871Z"
}
}
]
}
}