Microsoft Windows: Remote code execution in Graphic Fonts
Summary
A heap-based buffer overflow in the Windows Graphic Fonts component allows an unauthorized attacker to execute code over a network. The attack requires a user to take an action, such as opening a manipulated document or visiting a manipulated page. The CVSS base score is 8.8 (High), and the CISA SSVC assessment reports technical impact as total.
Affected
- Windows 10 Version 1607: 10.0.14393.0 before 10.0.14393.9688
- Windows 10 Version 1809: 10.0.17763.0 before 10.0.17763.9487
- Windows 10 Version 21H2: 10.0.19044.0 before 10.0.19044.7846
- Windows 10 Version 22H2: 10.0.19045.0 before 10.0.19045.7846
- Windows 11 Version 23H2: 10.0.22631.0 before 10.0.22631.7711
- Windows 11 Version 24H2: 10.0.26100.0 before 10.0.26100.9974
- Windows 11 Version 25H2: 10.0.26200.0 before 10.0.26200.9974
- Windows 11 Version 26H1: 10.0.28000.0 before 10.0.28000.3501
- Windows 11 Version 26H2: 10.0.26300.0 before 10.0.26300.9974
- Windows Server 2016 (including Server Core): 10.0.14393.0 before 10.0.14393.9688
- Windows Server 2019 (including Server Core): 10.0.17763.0 before 10.0.17763.9487
- Windows Server 2022: 10.0.20348.0 before 10.0.20348.5870
Fixed in
- Install the November 2026 Windows security update for each affected build. The build numbers listed under 'affected' are the first fixed builds.
- Exact KB numbers per build: Unknown. Confirm on the MSRC Security Update Guide.
Workaround
- Unknown. No workaround or mitigation is documented in the sources. Patching is the only documented remediation.
Exploitation
- No public exploitation known as of 10 November 2026.
- The vendor CVSS vector shows exploit code maturity E:U (unproven).
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
- Not listed in the CISA KEV catalog as far as the sources show.
Our recommendation
- Prioritise the November 2026 cumulative updates for all Windows 10, Windows 11 and Windows Server systems within the normal monthly patch cycle.
- Confirm the fixed build for each edition on the MSRC advisory before rollout.
- Check whether Windows 10 21H2 and 22H2 systems are still supported or covered by ESU, and plan upgrades if not.
- Monitor vendor and CISA updates for signs of exploitation and raise the priority if exploitation is reported.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Critical
- Impact
- Remote code execution – 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-2026-119969 msrc.microsoft.com
- CVE.org record CVE-2026-119969 www.cve.org
- Strix.ai: CVE-2026-119969 www.strix.ai
- Senserva KB 5132061 (third-party, unverified) senserva.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 10 Nov 2026, 21:36.
Original description (NVD)
Heap-based buffer overflow in Graphic Fonts allows an unauthorized attacker to execute code 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.
Affected? We can help.
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