October 24, 2022 · Applied Cybernetics Group
CVE-2020-3433 — Cisco AnyConnect Secure
known ransomware use
Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability
- Added to KEV
2022-10-24- Federal due date
2022-11-14- Vendor
- Cisco
- Product
- AnyConnect Secure
- EPSS
- 95.4th percentile (score 0.100, as of
2026-09-16) - NVD CVSS v3.1
- 7.8 (HIGH)
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2020-3433
CISA short description
Cisco AnyConnect Secure Mobility Client for Windows interprocess communication (IPC) channel allows for insufficient validation of resources that are loaded by the application at run time. An attacker with valid credentials on Windows could execute code on the affected machine with SYSTEM privileges.
Required action
Apply updates per vendor instructions.
NVD description
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.