What is CVE-2021-40124?

CVE-2021-40124 is a medium-severity vulnerability in Cisco Anyconnect Secure Mobility Client, classified under Incorrect Privilege Assignment. CVSS score: 6.7/10. Published 2021-11-04.

How severe is CVE-2021-40124?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Privilege escalation in Cisco Anyconnect Secure Mobility Client

CVE-2021-40124

A vulnerability in the Network Access Manager (NAM) module of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to escalate privileges on an affected device. This vulnerability is due to incorrect privilege assignment to scripts executed before user logon. An attacker could exploit this vulnerability by configuring a script to be executed before logon. A successful exploit could allow the attacker to execute arbitrary code with SYSTEM privileges.

Published 2021-11-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (14.3th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconne… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2021-40124?: CVE-2021-40124 is a medium-severity vulnerability in Cisco Anyconnect Secure Mobility Client, classified under Incorrect Privilege Assignment. CVSS score: 6.7/10. Published 2021-11-04.
How severe is CVE-2021-40124?: Medium severity. CVSS v3 base score is 6.7 out of 10.