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CVE

CVE-2026-62815

Microsoft QUIC: Remote Code Execution Vulnerability
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CVE

CVE-2026-62815

Microsoft QUIC: Remote Code Execution Vulnerability

Summary

Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

Details

New network path creations and removals triggered by incoming packets can lead to a pointer invalidation.

Patches

Impact

An unauthenticated attacker could exploit this vulnerability by sending a specially crafted packet to an affected service over the network. Successful exploitation could allow the attacker to execute code on the target system. No authentication or user interaction is required.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/microsoft/msquic/security/advisories/GHSA-92f5-vc22-8j33, https://nvd.nist.gov/vuln/detail/CVE-2026-62815, https://github.com/microsoft/msquic/pull/6217, https://github.com/microsoft/msquic/pull/6219, https://github.com/microsoft/msquic/pull/6220, https://github.com/microsoft/msquic/commit/583e7d5b509bb0bfa3518482d98879b6eda41ad0, https://github.com/microsoft/msquic/commit/9ff06b71fd4b4d5258361598ada5b24cbc1beb20, https://github.com/microsoft/msquic/commit/e0f55b5fdc9fff0b4465976d066ebd22fb7e2b3b, https://github.com/microsoft/msquic, https://github.com/microsoft/msquic/releases/tag/v2.4.19, https://github.com/microsoft/msquic/releases/tag/v2.5.10, https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62815

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00974%
EPSS Percentile
0.60921%
Introduced Version
2.5.3,0
Fix Available
2.5.10,2.4.19

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