CVE-2026-76462
Full vulnerability record from the local CVENow database.
Description
A vulnerability in the interprocess communication (IPC) channel of the Secure Firewall Posture module in Cisco Secure Client could allow an authenticated, local attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a series of crafted IPC messages to a local socket. A successful exploit could allow the attacker to perform limited file write operations on the filesystem with SYSTEM or root privileges. Although this vulnerability affects the Secure Firewall Posture module in Cisco Secure Client on Windows, macOS, and Linux operating systems, this vulnerability could be used to obtain full root privileges on macOS and Linux. For that reason Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-10-21 17:19:06.670000
Last modified
2026-10-22 23:19:07.260000
View original CVE JSON
{
"id": "CVE-2026-76462",
"sourceIdentifier": "[email protected]",
"published": "2026-10-21T17:19:06.670",
"lastModified": "2026-10-22T23:19:07.260",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the interprocess communication (IPC) channel of the Secure Firewall Posture module in Cisco Secure Client could allow an authenticated, local attacker to elevate privileges on an affected device.\r\n\r\nThis vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a series of crafted IPC messages to a local socket. A successful exploit could allow the attacker to perform limited file write operations on the filesystem with SYSTEM or root privileges.\r\nAlthough this vulnerability affects the Secure Firewall Posture module in Cisco Secure Client on Windows, macOS, and Linux operating systems, this vulnerability could be used to obtain full root privileges on macOS and Linux. For that reason Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Cisco",
"product": "Cisco Secure Client",
"defaultStatus": "unknown",
"versions": [
{
"version": "4.9.00086",
"status": "affected"
},
{
"version": "4.9.01095",
"status": "affected"
},
{
"version": "4.9.02028",
"status": "affected"
},
{
"version": "4.9.03047",
"status": "affected"
},
{
"version": "4.9.03049",
"status": "affected"
},
{
"version": "4.9.04043",
"status": "affected"
},
{
"version": "4.9.04053",
"status": "affected"
},
{
"version": "4.9.05042",
"status": "affected"
},
{
"version": "4.9.06037",
"status": "affected"
},
{
"version": "4.10.00093",
"status": "affected"
},
{
"version": "4.10.01075",
"status": "affected"
},
{
"version": "4.10.02086",
"status": "affected"
},
{
"version": "4.10.03104",
"status": "affected"
},
{
"version": "4.10.04065",
"status": "affected"
},
{
"version": "4.10.04071",
"status": "affected"
},
{
"version": "4.10.05085",
"status": "affected"
},
{
"version": "4.10.05095",
"status": "affected"
},
{
"version": "5.0.00238",
"status": "affected"
},
{
"version": "4.10.05111",
"status": "affected"
},
{
"version": "5.0.00529",
"status": "affected"
},
{
"version": "5.0.00556",
"status": "affected"
},
{
"version": "4.10.06079",
"status": "affected"
},
{
"version": "5.0.01242",
"status": "affected"
},
{
"version": "4.10.06090",
"status": "affected"
},
{
"version": "5.0.02075",
"status": "affected"
},
{
"version": "4.10.07061",
"status": "affected"
},
{
"version": "5.0.03072",
"status": "affected"
},
{
"version": "4.10.07062",
"status": "affected"
},
{
"version": "5.0.03076",
"status": "affected"
},
{
"version": "5.0.04032",
"status": "affected"
},
{
"version": "4.10.07073",
"status": "affected"
},
{
"version": "5.0.05040",
"status": "affected"
},
{
"version": "5.1.0.136",
"status": "affected"
},
{
"version": "5.1.1.42",
"status": "affected"
},
{
"version": "4.10.08025",
"status": "affected"
},
{
"version": "5.1.2.42",
"status": "affected"
},
{
"version": "4.10.08029",
"status": "affected"
},
{
"version": "5.1.3.62",
"status": "affected"
},
{
"version": "5.1.4.74",
"status": "affected"
},
{
"version": "5.1.5.65",
"status": "affected"
},
{
"version": "5.1.6.103",
"status": "affected"
},
{
"version": "5.1.7.80",
"status": "affected"
},
{
"version": "5.1.8.105",
"status": "affected"
},
{
"version": "5.1.8.122",
"status": "affected"
},
{
"version": "5.1.9.113",
"status": "affected"
},
{
"version": "5.1.10.233",
"status": "affected"
},
{
"version": "5.1.11.388",
"status": "affected"
},
{
"version": "5.1.12.146",
"status": "affected"
},
{
"version": "5.1.13.117",
"status": "affected"
},
{
"version": "5.1.13.177",
"status": "affected"
},
{
"version": "5.1.14.145",
"status": "affected"
},
{
"version": "5.1.15.287",
"status": "affected"
},
{
"version": "5.1.16.194",
"status": "affected"
},
{
"version": "5.1.17.3382",
"status": "affected"
},
{
"version": "5.1.17.3394",
"status": "affected"
},
{
"version": "5.1.18.314",
"status": "affected"
},
{
"version": "5.1.19.1862",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-21T00:00:00+00:00",
"id": "CVE-2026-76462",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-20"
}
]
}
],
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sec-client-priv-esc-muF8eZdm",
"source": "[email protected]"
}
]
}