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Back to active CVEs
High · CVSS 7.8Known ExploitedCVE-2020-3433

Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking VulnerabilityCVE-2020-3433

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 Nov 1, 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
ProductAffected versionsFixed versions
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:windows:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Cisco/Cisco AnyConnect Secure Mobility Clientgenericn/aNot reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Cisco/Cisco AnyConnect Secure Mobility Client.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Aug 17, 2020

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    May 24, 2026

  4. Added to CISA KEV

    Oct 24, 2022

    Evidence: source:kev:kev:kev:record

Sources and claim methodology

  • Source referencepacketstormsecurity.com
  • Source referencetools.cisco.com
  • CISA Known Exploited Vulnerabilities catalogcisa.gov
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.

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-427
Source
CVE List V5
Source checked
Nov 1, 2026
References
3 linked sources
Open source record