7.5High

CVE-2026-62898Microsoft QUIC Information Disclosure Vulnerability

Microsoft .NET 10.0 runtime; Microsoft .NET 8.0 runtime; Microsoft .NET 9.0 runtime; Microsoft Microsoft Visual Studio 2022 version 17.14 Published: 2026-08-11 20:07 (3 months ago)

Description

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

Weakness (CWE): CWE-416

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
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	.net	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 9.0 runtime	9.0.0 – < 9.0.19
microsoft	visual studio 2022	17.14.0 – < 17.14.38
microsoft	visual studio 2026	18.0 – < 18.8.3

References and patches

Microsoft QUIC Information Disclosure Vulnerability vendor-advisorypatchPatchVendor Advisory

CPE matches (NVD) (5)

cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* ≥ 17.14.0 < 17.14.38
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:* ≥ 18.8.0 < 18.8.3
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* ≥ 8.0.0 < 8.0.30
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* ≥ 9.0.0 < 9.0.19
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* ≥ 10.0.0 < 10.0.11

CVSS score

7.5High

Source: microsoft · CVSS 3.1

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

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

All scores (2)

cna	CVSS 3.1	7.5High
secure@microsoft.com	CVSS 3.1	7.5High

EPSS (chance of exploitation in 30 days)

1.03%

higher than 64% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: yes
Technical impact: partial

Timeline

ID reserved2026-07-14
Published2026-08-11 20:07
Reached IP-DB2026-10-24 23:45
Last updated2026-11-11 01:01

Assigned by (CNA): microsoft
NVD status: Analyzed

View at source: CVE.org · NVD

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