Cisco Secure Client Privilege Escalation Vulnerability
Summary
| CVE | CVE-2026-76462 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-21 17:19:06 UTC |
| Updated | 2026-10-21 18:54:37 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Problem Types: CWE-20 | CWE-20 Improper Input Validation
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| 3.1 | CNA | CVSSV3_1 | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
HighAvailability
NoneCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco Secure Client | affected 4.9.00086 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.9.01095 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.9.02028 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.9.03047 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.9.03049 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.9.04043 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.9.04053 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.9.05042 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.9.06037 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.00093 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.01075 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.02086 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.03104 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.04065 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.04071 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.05085 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.05095 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.0.00238 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.05111 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.0.00529 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.0.00556 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.06079 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.0.01242 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.06090 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.0.02075 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.07061 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.0.03072 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.07062 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.0.03076 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.0.04032 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.07073 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.0.05040 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.0.136 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.1.42 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.08025 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.2.42 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 4.10.08029 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.3.62 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.4.74 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.5.65 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.6.103 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.7.80 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.8.105 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.8.122 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.9.113 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.10.233 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.11.388 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.12.146 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.13.117 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.13.177 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.14.145 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.15.287 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.16.194 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.17.3382 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.17.3394 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.18.314 | Not specified |
| CNA | Cisco | Cisco Secure Client | affected 5.1.19.1862 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sec-cl... | [email protected] | sec.cloudapps.cisco.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Exploits
CNA: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
There are currently no legacy QID mappings associated with this CVE.