Windows Text Services Framework: Privilege escalation via out-of-bounds read
Summary
An out-of-bounds read in the Windows Text Services Framework allows an authorized local user with low privileges to elevate their privileges. The flaw affects supported Windows 10, Windows 11 and Windows Server 2019, 2022 and 2025 builds. An attacker needs an existing local logon and must run code on the system, for example after a phishing attack, a malicious installer or theft of a low-privilege password. The vulnerability cannot be exploited remotely from the internet.
Affected
- Windows 10 Version 1809 (10.0.17763.0 to before 10.0.17763.9487)
- Windows 10 Version 21H2 (10.0.19044.0 to before 10.0.19044.7846)
- Windows 10 Version 22H2 (10.0.19045.0 to before 10.0.19045.7846)
- Windows 11 Version 23H2 (10.0.22631.0 to before 10.0.22631.7711)
- Windows 11 Version 24H2 (10.0.26100.0 to before 10.0.26100.9974)
- Windows 11 Version 25H2 (10.0.26200.0 to before 10.0.26200.9974)
- Windows 11 Version 26H1 (10.0.28000.0 to before 10.0.28000.3501)
- Windows 11 Version 26H2 (10.0.26300.0 to before 10.0.26300.9974)
- Windows Server 2019, including Server Core (10.0.17763.0 to before 10.0.17763.9487)
- Windows Server 2022 (10.0.20348.0 to before 10.0.20348.5870)
- Windows Server 2025, including Server Core (10.0.26100.0 to before 10.0.26100.33822)
Fixed in
- Install the Microsoft security update for November 2026 for your Windows version.
- Minimum fixed builds: see the affected ranges above (first build not affected).
- Exact KB numbers: Unknown. Take them from the MSRC advisory or Windows Update.
Workaround
Unknown. Microsoft has not published a vendor workaround in the sources reviewed.
- Until patched, limit local logon to trusted users and restrict execution of untrusted code on workstations and terminal servers.
Exploitation
- Exploited in the wild: Not known. CISA SSVC assessment lists exploitation as none and automatable as no.
- Public proof of concept: None found.
- CISA KEV listing: Not found.
- NVD status at publication: Awaiting Analysis.
Our recommendation
- Apply the November 2026 Microsoft security updates to all affected Windows 10, Windows 11 and Windows Server systems, starting with shared and Remote Desktop (RDS) hosts.
- Check Windows 10 builds against their support status, as unsupported builds will not receive a fix.
- Restrict local logon and limit who can run untrusted software on workstations.
- Re-check the MSRC advisory and the NVD and CISA KEV entries for changes.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows Text Services Framework
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5132061, KB5132043, KB5131085, KB5131090, KB5131096, KB5131080
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-119925 msrc.microsoft.com
- CVE Record CVE-2026-119925 (CNA: Microsoft) www.cve.org
- Strix: CVE-2026-119925 (third-party) www.strix.ai
- Senserva: KB5131096 November 2026 update (third-party) senserva.com
- Senserva: KB5132061 November 2026 update (third-party) senserva.com
- Vulners: NVD record CVE-2026-85795 (related Text Services issue) vulners.com
- Strix: CVE-2026-119931 (related Text Services issue) www.strix.ai
- VulDB: entry 434166 (related, unverified) vuldb.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, 21:38.
Original description (NVD)
Out-of-bounds read in Windows Text Services Framework allows an authorized attacker to elevate privileges locally.
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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