Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability (CVE-2020-3433) | HOL Guard CVE

High · CVSS 7.8Known ExploitedCVE-2020-3433

Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability

Answer in brief

CVE-2020-3433 records a High severity (CVSS 7.8) vulnerability in Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability. The current sources mark it as known exploited. The current feed maps Cisco/Cisco AnyConnect Secure Mobility Client (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 17, 2020Updated Aug 12, 2026Source checked Sep 17, 2026First seen by HOL May 24, 2026Material review Aug 12, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.8. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Cisco/Cisco AnyConnect Secure Mobility Client (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:cisco:anyconnect_secure_mobility_client::::::windows::*	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Cisco/Cisco AnyConnect Secure Mobility Clientgeneric	n/a	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Cisco/Cisco AnyConnect Secure Mobility Client.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 17, 2020
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
May 24, 2026
Added to CISA KEV
Oct 24, 2022
Evidence: source:kev:kev:kev:record

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.