Is Integer Overflow affected by CVE-2026-32179?

Microsoft QUIC library versions prior to the patched commit contain a critical integer underflow vulnerability in ACK frame parsing that allows unauthenticated remote attackers to achieve privilege escalation on any system using affected NuGet packages.

CVE-2026-32179

CRITICAL

2026-04-16 https://github.com/microsoft/msquic

GHSA-gvvw-8j96-8g5r

Authentication Bypass Integer Overflow Microsoft

9.8

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Apr 16, 2026 - 01:20 vuln.today

DescriptionNVD

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.

MSRC CVE Info

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32179

AnalysisAI

Integer underflow in Microsoft QUIC's ACK frame parser enables remote unauthenticated privilege escalation. The vulnerability (CWE-191: integer wrap-around) affects Microsoft's native QUIC library implementations (both OpenSSL and SChannel variants) distributed via NuGet packages. …

RemediationAI

Within 24 hours: Identify all applications and services using Microsoft QUIC NuGet packages (both OpenSSL and SChannel variants) via dependency scanning; notify development and infrastructure teams. Within 7 days: Update all Microsoft QUIC NuGet packages to versions containing commit 1e6e999b or later; validate updates in staging environments. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

CVE-2026-32179 vulnerability details – vuln.today

Back

CVE-2026-32179

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

Summary

Details

Impact

MSRC CVE Info

AnalysisAI

RemediationAI

Full analysis requires sign-in

Share

External POC / Exploit Code