CVE-2026-62898

HIGH

MEDIUM Priority: 0.08 BB Relevance: 75/100

Published: 2026-08-11 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Network Low Complexity No Auth No Interaction Conf. Impact

AV: Network

AC: Low

PR: None

UI: None

S: Unchanged

C: High

I: None

A: None

Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.

CWE-416

Vendor	Product	Version
Microsoft	.NET 10.0 runtime	10.0.0 < 10.0.11
Microsoft	.NET 10.0 runtime	10.0.0 < 10.0.11
Microsoft	.NET 8.0 runtime	8.0.0 < 8.0.30
Microsoft	.NET 8.0 runtime	8.0.0 < 8.0.30
Microsoft	.NET 9.0 runtime	9.0.0 < 9.0.19
Microsoft	.NET 9.0 runtime	9.0.0 < 9.0.19
Microsoft	Microsoft Visual Studio 2022 version 17.14	17.14.0 < 17.14.38
Microsoft	Microsoft Visual Studio 2022 version 17.14	17.14.0 < 17.14.38
Microsoft	Microsoft Visual Studio 2026 version 18.8	18.0 < 18.8.3
Microsoft	Microsoft Visual Studio 2026 version 18.8	18.0 < 18.8.3
microsoft	.net	8.0.0 – 8.0.30
microsoft	.net	9.0.0 – 9.0.19
microsoft	.net	10.0.0 – 10.0.11
microsoft	.net	8.0.0 – 8.0.30
microsoft	.net	9.0.0 – 9.0.19
microsoft	.net	10.0.0 – 10.0.11
microsoft	visual_studio_2022	17.14.0 – 17.14.38
microsoft	visual_studio_2022	17.14.0 – 17.14.38
microsoft	visual_studio_2026	18.8.0 – 18.8.3
microsoft	visual_studio_2026	18.8.0 – 18.8.3

Patch Vendor Advisory

75 / 100

✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

7.5 / 10.0 v3.1

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

1.03%

Raw Score 0.010270

Percentile 63.5%

Date 2026-10-29

2026-10-29

0.01027

2026-10-28

0.01027

mitre ref →

nvd ref →