CVE-2023-20109: Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability
Cisco IOS and IOS XE contain an out-of-bounds write vulnerability in the Group Encrypted Transport VPN (GET VPN) feature that could allow an authenticated, remote attacker who has administrative control of either a group member or a key server to execute malicious code or cause a device to crash.
| Vendor | Cisco |
|---|---|
| Product | IOS and IOS XE |
| Date added to KEV | 2023-10-10 |
| Due date (BOD 22-01) | 2023-10-31 |
| Known ransomware campaign use | Unknown |
| CWE | CWE-787 |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
What to do
- Identify every instance of Cisco IOS and IOS XE in your environment (asset inventory, EDR, vulnerability scanner).
- Apply CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Federal civilian agencies must act by 2023-10-31 under BOD 22-01; other organizations can use the same date as a target.
- Check the vendor advisory and NVD entry linked below for affected versions, then record the fix in your change log.
Get new KEV entries in your inbox: free n8n workflow. Free CISA KEV Patch Digest (n8n workflow) (Runbook Foundry). A Monday-morning email of KEV entries added in the previous week (Mon-Sun), with your watchlist vendors listed first.
Not affiliated with n8n GmbH or CISA. Not tested on n8n Cloud. n8n is a trademark of n8n GmbH.