Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N H H N U H H H 6.6 .0248 84.1 YES
AFFECTED Product Versions Fixed IOS 12.4(24)T – — Cisco IOS XE Software 3.7.0S – —
TIMELINE Oct 27 Reserved by cisco Sep 27 Published (CNA: cisco) Oct 10 Added to CISA KEV, remediation due 2023-10-31
A vulnerability in the Cisco Group Encrypted Transport VPN (GET VPN) feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker who has administrative control of either a group member or a key server to execute arbitrary code on an affected device or cause the device to crash. This vulnerability is due to insufficient validation of attributes in the Group Domain of Interpretation (GDOI) and G-IKEv2 protocols of the GET VPN feature. An attacker could exploit this vulnerability by either compromising an installed key server or modifying the configuration of a group member to point to a key server that is controlled by the attacker. A successful exploit could allow the attacker to execute arbitrary code and gain full control of the affected system or cause the affected system to reload, resulting in a denial of service (DoS) condition. For more information, see the Details ["#details"] section of this advisory.
| Date | Event | Detail |
|---|---|---|
| October 27, 2022 | Reserved | Reserved by cisco |
| September 27, 2023 | Published | Published (CNA: cisco) |
| October 10, 2023 | KEV ADDED | Added to CISA KEV, remediation due 2023-10-31 |
Authoritative record: CVE-2023-20109 at cve.org
Vendors: cisco
Weaknesses: CWE-787
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-20109 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, October 7, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
