CVE-2020-3433: in the CISA KEV catalogue
Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability. CISA added CVE-2020-3433 to the Known Exploited Vulnerabilities catalogue on 2022-10-24 with a default due date of 2022-11-14. Known ransomware campaign use: Known. Forensic triage flag: No.
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. (CISA description)
- Vendor / product
- Cisco AnyConnect Secure
- CWE
- CWE-427
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 10%, percentile 95 (scored 2026-11-03)
EPSS puts about 10 in 100 odds (10%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 95% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2020-3433 in the CISA KEV catalogue?
Yes. CISA added CVE-2020-3433 (Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-10-24. CISA's default due date for it is 2022-11-14.
Is CVE-2020-3433 used in ransomware attacks?
CISA marks known ransomware campaign use as Known for CVE-2020-3433.
What should I do about CVE-2020-3433?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2020-3433