CVE-2020-3433Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability
Updated under an hour ago ()
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It affects Cisco AnyConnect Secure Mobility Client. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Oct 24, 2022; federal agencies had to remediate by Nov 14, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-427
- Known exploited
- Added to CISA KEV Oct 24, 2022; federal remediation due Nov 14, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 10.05% (percentile 96)
- Assigned by
- cisco
- NVD analysis
- Analyzed
- Record last updated
- Aug 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Cisco Cisco AnyConnect Secure Mobility Client cisco:anyconnect_secure_mobility_client (from the name) | all versions | CNA record |
cisco anyconnect_secure_mobility_client cisco:anyconnect_secure_mobility_client | before 4.9.00086 | NVD |
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dll-F26WwJWvendor-advisory, x-refsource-cisco
- http://packetstormsecurity.com/files/159420/Cisco-AnyConnect-Privilege-Escalation.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3433us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.