CVE-2026-32179 json
MsQuic has a Remote Elevation of Privilege Vulnerability
published 2026-04-16 6 mo ago modified 2026-05-08 6 mo ago also GHSA-gvvw-8j96-8g5r
- cvss
- 9.8
- version 3.1, GitHub
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- —
- no EPSS score yet
- public exploits
- 0
- none known
Summary
### 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.
Patch / fix
- nuget Microsoft.Native.Quic.MsQuic.OpenSSL 2.4.18, 2.5.7
- nuget Microsoft.Native.Quic.MsQuic.Schannel 2.4.18, 2.5.7
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Microsoft.Native.Quic.MsQuic.OpenSSL | >=2.5.0-ci.532574, <2.5.7 <2.4.18 |
2.5.7 2.4.18 |
| nuget | Microsoft.Native.Quic.MsQuic.Schannel | >=2.5.0-ci.532574, <2.5.7 <2.4.18 |
2.5.7 2.4.18 |
Classification
- Weakness
-
- CWE-191 Integer Underflow (Wrap or Wraparound)
References
Sources
- GitHub Advisory GHSA-gvvw-8j96-8g5r
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