CVE-2023-20109
CISA KEVPublished October 10, 2023 · Updated April 3, 2026
high
Official Description+
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.
Affected Products
| Vendor | Product |
|---|---|
| Cisco | IOS and IOS XE |
Patch Status
Patch by 2023-10-31
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2023-20109.