# CVE-2020-3433: Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability

> CVE-2020-3433: Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-3433
Last updated: 2026-08-12T03:55:39Z

- Published: 2020-08-17 18:01 UTC · Updated: 2026-08-12 03:55 UTC · Assigner: cisco
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 10.0%, 96th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-10-24, federal due date 2022-11-14, ransomware use: Known
- CWE: 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Cisco: Cisco AnyConnect Secure Mobility Client

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-3433)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-3433)
- [http://packetstormsecurity.com/files/159420/Cisco-AnyConnect-Privilege-Escalation.html](http://packetstormsecurity.com/files/159420/Cisco-AnyConnect-Privilege-Escalation.html)
- [https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dll-F26WwJW](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dll-F26WwJW)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-3433 · Markdown: https://rewindex.com/cve/CVE-2020-3433.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-3433 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:05:28.405Z