Critical (9.8). EPSS 4.7% chance of exploitation in the next 30 days.
OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c.
Severity
CVSS 3.1
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
4.7% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-31)