microsoft/msquic · Security
MsQuic has a Remote Elevation of Privilege Vulnerability
- GHSA ID
- GHSA-gvvw-8j96-8g5r
- CVE ID
- CVE-2026-32179
- Severity
- critical
- Published
- Updated
- CVSS
- 9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS v3
- 9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
Summary
Improper input validation in Microsoft QUIC allows an unauthorized attacker to elevate privileges over a network.
Details
Improper Input Validation Integer Underflow (Wrap or Wraparound) when decoding ACK frame.
Patches
- Fix underflow in ACK frame parsing - 1e6e999b
Impact
An attacker who successfully exploited this vulnerability could gain elevated privileges.
CWEs
- CWE-191 · Integer Underflow (Wrap or Wraparound)