CVE-2020-3153

What the flaw is

Cisco AnyConnect Secure Mobility Client for Windows allows for incorrect handling of directory paths. An attacker with valid credentials on Windows would be able to copy malicious files to arbitrary locations with system level privileges. This could include DLL pre-loading, DLL hijacking, and other related attacks.

Description as published by CISA. We have not independently reproduced it.

What CISA requires

Apply updates per vendor instructions.

This deadline is binding on US federal civilian agencies under BOD 22-01. It is not a legal deadline for anyone else, but it is a useful urgency signal — CISA sets it by how actively the flaw is being used, not by CVSS.

Public exploit code

22 public repositories referencing this CVE have been catalogued on GitHub. Treat this as a strong signal to prioritise patching, not as a verified working exploit — many such repositories are scanners, write-ups or forks rather than functional code.

• 0xT11/CVE-POC
• 20142995/sectool
• ARPSyndicate/cvemon
• NetW0rK1le3r/awesome-hacking-lists
• Ostorlab/KEV
• Ostorlab/known_exploited_vulnerbilities_detectors
• alphaSeclab/sec-daily-2020
• anquanscan/sec-tools

Showing 8 of 22. Full list in the trickest/cve dataset.

Vendor advisories

• tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-win-
• nvd.nist.gov/vuln/detail/CVE-2020-3153

Primary sources

• NVD entry — CVSS score, CPE list and references
• CISA KEV catalog — the source for this page
• CVE Record at cve.org