227 lines
9.8 KiB
JSON
227 lines
9.8 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-2026-58216",
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"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
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"state": "PUBLISHED",
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"assignerShortName": "redhat",
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"dateReserved": "2026-06-29T18:13:08.159Z",
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"datePublished": "2026-07-30T15:40:11.673Z",
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"dateUpdated": "2026-07-31T22:57:42.253Z"
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},
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"containers": {
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"cna": {
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"title": "Samba: kpasswd service: kpasswd packet that contains malformed asn.1 might cause the server to access 6 bytes of unallocated memory leading server to crash",
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"metrics": [
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{
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"other": {
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"content": {
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"value": "Moderate",
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"namespace": "https://access.redhat.com/security/updates/classification/"
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},
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"type": "Red Hat severity rating"
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}
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},
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{
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"cvssV3_1": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 5.3,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "LOW",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"version": "3.1"
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},
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"format": "CVSS"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) service. When processing malformed ASN.1-encoded Kerberos password change request, Samba server miscalculates the structure size and attempts to read up to six bytes beyond the end of the allocated buffer. While this out-of-bounds read typically results in a harmless decryption failure, if the read hits unmapped memory, it causes the KDC process to crash. An authenticated attacker can send a specially crafted kpasswd request containing malformed ASN.1 data to trigger the out-of-bounds read, which may cause the KDC process to terminate, resulting in a denial of service."
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}
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],
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"affected": [
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{
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"vendor": "Red Hat",
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"product": "Red Hat Enterprise Linux 10",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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"packageName": "samba",
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"defaultStatus": "unknown",
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"cpes": [
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"cpe:/o:redhat:enterprise_linux:10"
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]
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},
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{
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"vendor": "Red Hat",
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"product": "Red Hat Enterprise Linux 6",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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"packageName": "samba",
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"defaultStatus": "unknown",
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"cpes": [
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"cpe:/o:redhat:enterprise_linux:6"
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]
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},
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{
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"vendor": "Red Hat",
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"product": "Red Hat Enterprise Linux 6",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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"packageName": "samba4",
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"defaultStatus": "unknown",
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"cpes": [
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"cpe:/o:redhat:enterprise_linux:6"
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]
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},
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{
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"vendor": "Red Hat",
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"product": "Red Hat Enterprise Linux 7",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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"packageName": "samba",
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"defaultStatus": "unknown",
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"cpes": [
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"cpe:/o:redhat:enterprise_linux:7"
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]
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},
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{
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"vendor": "Red Hat",
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"product": "Red Hat Enterprise Linux 8",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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"packageName": "samba",
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"defaultStatus": "unknown",
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"cpes": [
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"cpe:/o:redhat:enterprise_linux:8"
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]
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},
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{
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"vendor": "Red Hat",
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"product": "Red Hat Enterprise Linux 9",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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"packageName": "samba",
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"defaultStatus": "unknown",
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"cpes": [
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"cpe:/o:redhat:enterprise_linux:9"
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]
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},
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{
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"vendor": "Red Hat",
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"product": "Red Hat OpenShift Container Platform 4",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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"packageName": "rhcos",
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"defaultStatus": "unknown",
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"cpes": [
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"cpe:/a:redhat:openshift:4"
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]
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}
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],
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"references": [
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{
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"url": "https://access.redhat.com/security/cve/CVE-2026-58216",
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"tags": [
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"vdb-entry",
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"x_refsource_REDHAT"
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]
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},
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{
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502721",
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"name": "RHBZ#2502721",
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"tags": [
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"issue-tracking",
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"x_refsource_REDHAT"
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]
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},
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{
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"url": "https://bugzilla.samba.org/show_bug.cgi?id=16087"
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},
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{
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"url": "https://www.samba.org/samba/security/CVE-2026-58216.html"
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}
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],
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"datePublic": "2026-07-28T10:00:00.000Z",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-125",
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"description": "Out-of-bounds Read",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"x_redhatCweChain": "CWE-125: Out-of-bounds Read",
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"workarounds": [
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{
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"lang": "en",
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"value": "Administrators who do not require the Kerberos password change service may disable it by setting ```kpasswd port = 0``` in ```/etc/samba/smb.conf```. \n\nWhere disabling the service is not practical, rate-limiting access to the kpasswd service may reduce the likelihood of successful exploitation until an updated package can be applied.\n\nNote: Disabling kpasswd port will prevent domain users from changing their Kerberos passwords via the kpasswd protocol until patched."
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}
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],
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"timeline": [
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{
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"lang": "en",
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"time": "2026-07-20T10:42:18.274Z",
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"value": "Reported to Red Hat."
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},
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{
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"lang": "en",
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"time": "2026-07-28T10:00:00.000Z",
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"value": "Made public."
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "Red Hat would like to thank Tristan Madani (@TristanInSec) (Talence Security) for reporting this issue."
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}
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],
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"providerMetadata": {
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"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
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"shortName": "redhat",
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"dateUpdated": "2026-07-30T15:50:04.063Z"
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},
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"x_generator": {
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"engine": "cvelib 1.8.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-07-31T22:57:32.483621Z",
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"id": "CVE-2026-58216",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-07-31T22:57:42.253Z"
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}
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}
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]
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}
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} |