Microsoft Windows: Out-of-bounds read in Graphic Fonts (information disclosure)
Summary
A out-of-bounds read in the Graphic Fonts component of Windows allows an authorized attacker to read memory and disclose information over a network. The CVSS vector requires low privileges and user interaction, and it rates the impact as high for confidentiality only. Microsoft rates the flaw Important, and no public exploitation or proof of concept has been reported.
Affected
- Windows 10 Version 1607 and Windows Server 2016 (including Server Core): before 10.0.14393.9688
- Windows 10 Version 1809 and Windows Server 2019 (including Server Core): before 10.0.17763.9487
- Windows 10 Version 21H2: before 10.0.19044.7846
- Windows 10 Version 22H2: before 10.0.19045.7846
- Windows 11 Version 23H2: before 10.0.22631.7711
- Windows 11 Version 24H2: before 10.0.26100.9974
- Windows 11 Version 25H2 and 26H2: before 10.0.26200.9974 and 10.0.26300.9974
- Windows 11 Version 26H1: before 10.0.28000.3501
- Windows Server 2022: before 10.0.20348.5870
- Windows Server 2025: unverified (the build listed by a third-party aggregator conflicts with the CVE record)
Fixed in
Security update published with the November 2026 Patch Tuesday, for the builds listed above. KB article numbers unknown; check the MSRC advisory.
Workaround
Unknown. No workaround is described in the sources reviewed. Check the MSRC advisory for any documented mitigation.
Exploitation
- No evidence of exploitation in the wild or public proof of concept found.
- CISA SSVC: exploitation none, not automatable.
- Rapid7: exploitation less likely, not publicly disclosed.
- Whether CISA added this CVE to the KEV catalogue is unverified.
Our recommendation
- Apply the November 2026 cumulative update to all Windows 10, 11 and Server systems in scope.
- Confirm the installed build against the MSRC fixed-build list, since the product list is not fully verified.
- Check Extended Security Updates status for Windows 10 builds past end of support.
- Prioritise after the Outlook zero-day and the Graphic Fonts elevation-of-privilege and remote code execution CVEs from the same release.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Information disclosure – Graphic Fonts
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131291, KB5131085, KB5131096, KB5131090, KB5131087, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-88211 msrc.microsoft.com
- CVE Record CVE-2026-88211 www.cve.org
- Strix: CVE-2026-88211 www.strix.ai
- Cybersecuritynews: Microsoft November 2026 Patch Tuesday cybersecuritynews.com
- Rapid7: Patch Tuesday November 2026 www.rapid7.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 15:46.
Original description (NVD)
Out-of-bounds read in Graphic Fonts allows an authorized attacker to disclose information over a network.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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