Description
Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
Affected products
microsoft: visual studio 2022; microsoft: visual studio 2026; microsoft: .net
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62898 PatchVendor Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 1% percentile: 64 · as of 12 November 2026
- CWE
- CWE-416
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.