What is CVE-2021-1567?

CVE-2021-1567 is a high-severity vulnerability in Cisco Anyconnect Secure Mobility Client, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.0/10. Published 2021-06-16.

How severe is CVE-2021-1567?

High severity. CVSS v3 base score is 7.0 out of 10.

Vulnerability in Cisco Anyconnect Secure Mobility Client

CVE-2021-1567

A vulnerability in the DLL loading mechanism of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device if the VPN Posture (HostScan) Module i…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.000 (12.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Cisco Anyconnect Secure Mobility Client — versions n/a

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

20210616 Cisco AnyConnect Secure Mobility Client for Windows with VPN Posture (HostScan) Module DLL Hijacking Vulnerability (vendor-advisory, x_refsource_CISCO)

Frequently asked questions

What is CVE-2021-1567?: CVE-2021-1567 is a high-severity vulnerability in Cisco Anyconnect Secure Mobility Client, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.0/10. Published 2021-06-16.
How severe is CVE-2021-1567?: High severity. CVSS v3 base score is 7.0 out of 10.