CVE-2023-20109A 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 contr…
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It affects Cisco IOS and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Oct 10, 2023; federal agencies had to remediate by Oct 31, 2023. Treat that date as your deadline.
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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.
- CVSS
- 6.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Added to CISA KEV Oct 10, 2023; federal remediation due Oct 31, 2023Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 2.48% (percentile 84)
- Assigned by
- cisco
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Cisco IOS cisco:ios (from the name) | 12.4(24)T; 12.4(24)T3; 12.4(22)T1; 12.4(24)T5; 12.4(24)T4; 12.4(22)T; 12.4(24)T8; 12.4(24)T2; and 193 more ranges | CNA record |
Cisco Cisco IOS XE Software cisco:ios_xe_software (from the name) | 3.7.0S; 3.7.1S; 3.7.2S; 3.7.3S; 3.7.4S; 3.7.5S; 3.7.6S; 3.7.7S; and 193 more ranges | CNA record |
cisco ios cisco:ios | 12.4(22)md; 12.4(22)md1; 12.4(22)md2; 12.4(22)mda; 12.4(22)mda1; 12.4(22)mda2; 12.4(22)mda3; 12.4(22)mda4; and 193 more ranges | NVD |
cisco ios_xe cisco:ios_xe | 3.3.0sg; 3.3.1sg; 3.3.2sg; 3.4.0sg; 3.4.1sg; 3.4.2sg; 3.4.3sg; 3.4.4sg; and 193 more ranges | NVD |
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-getvpn-rce-g8qR68sxvendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20109us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.