CVE-2026-96988: Windows DNS Information Disclosure Vulnerability
This Microsoft advisory covers CVE-2026-96988 in Windows Server 2016, Windows Server 2019 and Windows Server 2022.
- CVE-2026-96988
Key facts
- Vendor rating
- Medium, CVSS 4.9
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C· base score 4.9, scored by microsoftAttack vector: network. Attack complexity: low. Privileges required: high. User interaction: none. Scope: unchanged. Confidentiality impact: high. Integrity impact: none. Availability impact: none.- Weakness
- CWE-125: Out-of-bounds Read
- CISA KEV
- Not listed (catalogue checked )
- Fixed in
- KB5131291 (build 10.0.14393.9688), KB5131085 (build 10.0.17763.9487), KB5131090 (build 10.0.20348.5870) and 2 more below
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
Windows DNS Information Disclosure Vulnerability
Affected products named by the advisory: Windows Server 2016; Windows Server 2019; Windows Server 2022; Windows Server 2025.
Text from the source record.
How to fix CVE-2026-96988
Upgrade to a fixed release named by Microsoft:
- KB5131291 (build 10.0.14393.9688)
- KB5131085 (build 10.0.17763.9487)
- KB5131090 (build 10.0.20348.5870)
- KB5131080 (build 10.0.26100.33822)
- KB5131077 (build 10.0.26100.33730)
Vendor guidance
- Install the applicable security update for your platform: KB5131291, KB5131085, KB5131090, KB5131080, KB5131077 (see the Microsoft Update Catalog).
End-of-life dates for Windows Server
More Microsoft Server advisories
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Microsoft Server advisories, November 2026All Microsoft Server advisories
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