CVE Watch—

CVE-2023-20109

Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability

CVSS

—

No CVSS

EPSS

2.3%

p82

KEV

YES

Oct 10, 2023

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

2.3%EPSS · 30 days2.3%

2026-06-302026-07-16

KEV catalog record

Product

Cisco / IOS and IOS XE

Vulnerability

Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability

Added to KEV

Oct 10, 2023

Remediate by

Oct 31, 2023

Known ransomware use

Summary 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.

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-getvpn-rce-g8qR68sx; https://nvd.nist.gov/vuln/detail/CVE-2023-20109

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