High (7.4). EPSS 5.0% chance of exploitation in the next 30 days.
A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.
Severity
CVSS 3.1
7.4 high
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
5.0% chance of exploitation in the next 30 days; higher than 92% of CVEs (scores of 2026-10-31)