CVE-2026-26154: CWE-20: Improper Input Validation in Microsoft Windows Server 2012
CVE-2026-26154 is a high-severity vulnerability in Microsoft Windows Server 2012 involving improper input validation in the Windows Server Update Service. This flaw allows an unauthorized attacker to perform tampering over a network, potentially impacting system availability. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-26154) arises from improper input validation in the Windows Server Update Service component of Microsoft Windows Server 2012 (version 6.2.9200.0). The flaw enables an unauthenticated attacker to tamper with the service remotely, which can lead to denial of service or other availability impacts. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and an impact limited to availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
The vulnerability allows an unauthenticated attacker to tamper with the Windows Server Update Service remotely, causing an availability impact on affected Windows Server 2012 systems. There is no confidentiality or integrity impact reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26154 to remediate this vulnerability.
CVE-2026-26154: CWE-20: Improper Input Validation in Microsoft Windows Server 2012
Description
CVE-2026-26154 is a high-severity vulnerability in Microsoft Windows Server 2012 involving improper input validation in the Windows Server Update Service. This flaw allows an unauthorized attacker to perform tampering over a network, potentially impacting system availability. An official fix is available from Microsoft to address this issue.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-26154) arises from improper input validation in the Windows Server Update Service component of Microsoft Windows Server 2012 (version 6.2.9200.0). The flaw enables an unauthenticated attacker to tamper with the service remotely, which can lead to denial of service or other availability impacts. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and an impact limited to availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
The vulnerability allows an unauthenticated attacker to tamper with the Windows Server Update Service remotely, causing an availability impact on affected Windows Server 2012 systems. There is no confidentiality or integrity impact reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26154 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-11T16:24:51.135Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26154","vendor":"Microsoft"}]
Threat ID: 69de7a1682d89c981fd6a633
Added to database: 4/14/2026, 5:32:06 PM
Last enriched: 4/14/2026, 7:18:06 PM
Last updated: 4/15/2026, 6:08:16 AM
Views: 3
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