Microsoft XPS Document Converter: Heap-based buffer overflow allows privilege escalation
Summary
Microsoft XPS Document Converter contains a heap-based buffer overflow (CWE-122, CWE-190). According to the CVE record, an unauthorized attacker can elevate privileges over a network. The CVSS 3.1 base score is 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), and the NVD status is still Awaiting Analysis.
Affected
- Windows 10 Version 1607 and Windows Server 2016 (including Server Core): 10.0.14393.0 to below 10.0.14393.9688
- Windows 10 Version 1809 and Windows Server 2019 (including Server Core): 10.0.17763.0 to below 10.0.17763.9487
- Windows 10 Version 21H2: 10.0.19044.0 to below 10.0.19044.7846
- Windows 10 Version 22H2: 10.0.19045.0 to below 10.0.19045.7846
- Windows 11 Version 23H2: 10.0.22631.0 to below 10.0.22631.7711
- Windows 11 Version 24H2: 10.0.26100.0 to below 10.0.26100.9974
- Windows 11 Version 25H2: 10.0.26200.0 to below 10.0.26200.9974
- Windows 11 Version 26H1: 10.0.28000.0 to below 10.0.28000.3501
- Windows 11 Version 26H2: 10.0.26300.0 to below 10.0.26300.9974
- Windows Server 2022: 10.0.20348.0 to below 10.0.20348.5870
Fixed in
According to the CNA record, the fixed builds are the versions listed as the upper limit of each affected range: 10.0.14393.9688, 10.0.17763.9487, 10.0.19044.7846, 10.0.19045.7846, 10.0.22631.7711, 10.0.26100.9974, 10.0.26200.9974, 10.0.28000.3501, 10.0.26300.9974 and 10.0.20348.5870. Verify against the Microsoft Security Update Guide.
Workaround
Unknown.
Exploitation
No known exploitation at the time of writing. CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
Our recommendation
- Install the Microsoft security update for all affected Windows clients and servers listed above.
- Prioritise servers and systems where XPS components are used.
- Check the Microsoft Security Update Guide and NVD for updates to the vector, affected builds and exploitation status.
- Monitor for exploitation reports and apply the update as part of the regular patch cycle, or sooner if exploitation is reported.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Microsoft XPS Document Converter
- 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-2026-119881 msrc.microsoft.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, 20:26.
Original description (NVD)
Heap-based buffer overflow in Microsoft XPS Document Converter allows an unauthorized attacker to elevate privileges 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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