Windows PostScript Printer Driver: Heap-based buffer overflow
Summary
A heap-based buffer overflow in the Microsoft PostScript Printer Driver in Windows allows a local attacker to elevate privileges. The attack requires local access to the system and user interaction (UI:R). The CVSS score is 7.8 (High), with total impact rated for confidentiality, integrity and availability. At the time of writing, no exploitation and no public proof of concept are known.
Affected
- Windows 10 Version 1607 (10.0.14393.0 to before 10.0.14393.9612)
- Windows 10 Version 1809 (10.0.17763.0 to before 10.0.17763.9376)
- Windows 10 Version 21H2 and 22H2 (10.0.19044.0 and 10.0.19045.0 to before 10.0.19045.7807)
- Windows 11 Version 23H2 (10.0.22631.0 to before 10.0.22631.7652)
- Windows 11 Version 24H2 and 25H2 (10.0.26100.0 and 10.0.26200.0 to before 10.0.26100.9711 and 10.0.26200.9711)
- Windows 11 Version 26H1 (10.0.28000.0 to before 10.0.28000.3231)
- Windows 11 Version 26H2 (10.0.26300.0 to before 10.0.26300.9711)
- Windows Server 2012 and 2012 R2, including Server Core (6.2.9200.0 to before 6.2.9200.26434 and 6.3.9600.0 to before 6.3.9600.23470)
- Windows Server 2016 (10.0.14393.0 to before 10.0.14393.9612)
- Note: the sources partly disagree on version details. Verify against the MSRC advisory.
Fixed in
- Windows 10 Version 1607 and Windows Server 2016: 10.0.14393.9612 (per CNA record; cumulative update KB unknown)
- Windows 10 Version 1809: 10.0.17763.9376
- Windows 10 Version 21H2 and 22H2: 10.0.19045.7807
- Windows 11 Version 23H2: 10.0.22631.7652
- Windows 11 Version 24H2, 25H2 and 26H2: 10.0.26100.9711, 10.0.26200.9711 and 10.0.26300.9711
- Windows 11 Version 26H1: 10.0.28000.3231
- Windows Server 2012: 6.2.9200.26434; Windows Server 2012 R2: 6.3.9600.23470
- Source: CNA record. Confirm on the MSRC advisory before relying on a build number.
Workaround
- No vendor workaround known. Status: unknown.
- Practical measure (not from a vendor source): limit local logon and printer driver installation rights on shared or multi-user systems until patched.
Exploitation
- Known exploited (KEV): no.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- No public proof-of-concept found.
Our recommendation
- Install the October 2026 Microsoft security update on all affected systems. For Windows 10 Version 1607, confirm the fixed build and KB on the MSRC advisory first.
- Check whether Windows 10 Version 1607 is still supported. If it is not, plan an upgrade.
- Limit local logon and printer driver installation on shared workstations, terminal servers and kiosks.
- Check the other October 2026 Microsoft CVEs for the same driver in the MSRC update.
Information from Microsoft (Patch Tuesday October 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Microsoft PostScript Printer Driver
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5127648, KB5126646, KB5126657, KB5126655, KB5126653, KB5127646
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-70092 msrc.microsoft.com
- CVE Program record (cvelistV5 baseline) github.com
- Vulners NVD mirror: CVE-2026-70092 vulners.com
- OpenCVE: CVE-2026-70092 app.opencve.io
- VulDB: CVE-2026-70092 vuldb.com
- Strix: CVE-2026-70092 www.strix.ai
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 2 Nov 2026, 04:24.
Original description (NVD)
Heap-based buffer overflow in Microsoft PostScript Printer Driver allows an unauthorized 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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