Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability
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 Gr
What happened
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.
CISA lists it as exploited, added 10 Oct 2023.
Does it affect you
Names Cisco IOS XE. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Follow the vendor advisory for the fixed release and any interim mitigation.
sec.cloudapps.cisco.com - Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- cisco-iosxe
- Cisco IOS XE: exactly 3.3.0sg
The record
- NVD status
- Analyzed
- Published
- 27 Sep 2023, last modified 17 Jun 2026 (NVD)
- Severity
- CVSS 3.1 base score 6.6, Medium — computed here from the vector; NVD states 6.6.
- Vector
- CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-787 Out-of-bounds Write (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 10 Oct 2023; federal remediation due 31 Oct 2023. CISA entry
- Vendor
- Cisco · IOS and IOS XE (CISA)
References on the NVD record
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.