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TI-2021-00985 Aliases CVE-2021-1258GHSA-8f4f-mpwv-cr26

Cisco AnyConnect Secure Mobility Client Arbitrary File Read Vulnerability

Priority LOW 25CWE-264Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass, Privilege escalation
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-264 and CWE-269.

Summary

A vulnerability in the upgrade component of Cisco AnyConnect Secure Mobility Client could allow an authenticated, local attacker with low privileges to read arbitrary files on the underlying operating system (OS) of an affected device. The vulnerability is due to insufficient file permission restrictions. An attacker could exploit this vulnerability by sending a crafted command from the local CLI to the application. A successful exploit could allow the attacker to read arbitrary files on the underlying OS of the affected device. The attacker would need to have valid user credentials to exploit this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00341 27th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco AnyConnect Secure Mobility Clientall versions—No fix listedCNA
  • Cisco AnyConnect Secure Mobility Client VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:linux_kernel:*:*before 4.9.03047VulnerableCisco
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:macos:*:*before 4.9.03047VulnerableCisco
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:windows:*:*before 4.9.03049VulnerableCisco
cpe:2.3:a:mcafee:agent_epolicy_orchestrator_extension:*:*:*:*:*:*:*:*before 5.7.6VulnerableMcAfee
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:linux_kernel:*:* Versions before 4.9.03047 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:macos:*:* Versions before 4.9.03047 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:windows:*:* Versions before 4.9.03049 Vulnerable ·Cisco
  • cpe:2.3:a:mcafee:agent_epolicy_orchestrator_extension:*:*:*:*:*:*:*:* Versions before 5.7.6 Vulnerable ·McAfee
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1258
  2. 2026-10-03 Alias added: GHSA-8f4f-mpwv-cr26

References

Advisory 2

  • TI-2020-02982 Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability KEVCVSS 3.1HIGH 7.8
  • TI-2020-02715 Cisco AnyConnect Secure Mobility Client for Windows Uncontrolled Search Path Vulnerability KEVCVSS 3.1MEDIUM 6.5
  • TI-2011-01789 The helper application in Cisco AnyConnect Secure Mobility Client (formerly AnyConnect… CVSS 2.0HIGH 7.6
  • TI-2011-01790 The helper application in Cisco AnyConnect Secure Mobility Client (formerly AnyConnect… CVSS 2.0HIGH 9.3
  • TI-2012-02179 The VPN downloader implementation in the WebLaunch feature in Cisco AnyConnect Secure… CVSS 2.0HIGH 9.3
  • TI-2023-06884 Incorrect default permissions in Cisco Secure Client CVSS 3.1HIGH 7.8
See all 68 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences