Microsoft QUIC Remote Code Execution Vulnerability
cve-program · CVE-2026-62815
PublishedUse after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Read the publisher's advisoryeuvd · EUVD-2026-56392
PublishedUse after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Read the publisher's advisorynvd · CVE-2026-62815
PublishedUse after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Read the publisher's advisoryosv · GHSA-2q33-cf8w-7q23
Withdrawn## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-92f5-vc22-8j33. This link is maintained to preserve external references. ## Original Description Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Read the publisher's advisoryosv · GHSA-92f5-vc22-8j33
Published# 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 - Guard path promotion [e0f55b5](https://github.com/microsoft/msquic/commit/e0f55b5fdc9fff0b4465976d066ebd22fb7e2b3b) # 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.
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-62815 · CVE overview and exploitation status
cve-program · CVE-2026-62815
euvd · EUVD-2026-56392
nvd · CVE-2026-62815
osv · GHSA-2q33-cf8w-7q23
- https://nvd.nist.gov/vuln/detail/CVE-2026-62815
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62815
osv · GHSA-92f5-vc22-8j33
- 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
Related changes
Linked by CVE identifierNo related changes are available here.