CVE-2026-103577 | BDVDB-2026-388267 Detail

MicrosoftWindows 11 version 23H2

Description#

Insecure default variable initialization in Microsoft QUIC allows an unauthorized attacker to bypass a security feature over a network.

Per CVSS v3.1: confidentiality impact none, integrity impact low, availability impact high. Attack vector: network.

No public exploit known

7.5 High

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 47.8.

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Not classified

No specific action is recorded in the source data. Check the references for vendor guidance.

Not available

7.5 High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:H/E:U/RL:O/RC:C

Not available

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).