CVE-2020-3433: Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability
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.
| Vendor | Cisco |
|---|---|
| Product | AnyConnect Secure |
| Date added to KEV | 2022-10-24 |
| Due date (BOD 22-01) | 2022-11-14 |
| Known ransomware campaign use | Known |
| CWE | CWE-427 |
| Required action | Apply updates per vendor instructions. |
What to do
- Identify every instance of Cisco AnyConnect Secure in your environment (asset inventory, EDR, vulnerability scanner).
- Apply CISA's required action: Apply updates per vendor instructions.
- Federal civilian agencies must act by 2022-11-14 under BOD 22-01; other organizations can use the same date as a target.
- Because ransomware use is known, check for signs of compromise and confirm backups are offline and tested.
- Check the vendor advisory and NVD entry linked below for affected versions, then record the fix in your change log.
This CVE is flagged by CISA as known to be used in ransomware campaigns. Rehearse your response before you need it: Ransomware tabletop exercise kit (Runbook Foundry).