CVEvulnerability

CVE-2020-3433

7.8 HIGH Known exploited Published 2020-08-17 Modified 2026-08-12 Official page ↗

CISA Known Exploited Vulnerability

Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability — Cisco AnyConnect Secure

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.

Added to KEV
2022-10-24
Remediation due
2022-11-14
Ransomware use
Known
Required action
Apply updates per vendor instructions.
Notes
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dll-F26WwJW; https://nvd.nist.gov/vuln/detail/CVE-2020-3433
Status
Analyzed
Published
2020-08-17
Last modified
2026-08-12
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
Weaknesses
CWE-427

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.

Affected configurations

• cisco anyconnect secure mobility client (< 4.9.00086)

Related

Weakness · CWE (1)

  • CWE-427 Uncontrolled Search Path Element weakness

References