Microsoft SPP: Stack-based buffer overflow allows local privilege escalation
Summary
A stack-based buffer overflow in the Software Protection Platform (SPP), a Windows component, affects multiple Windows 10, Windows 11 and Windows Server versions. An authorized attacker with a low-privileged local account can exploit it to elevate privileges. No user interaction is required, and the flaw does not affect remote systems directly.
Affected
- Windows 10 Version 1809 (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 (before 10.0.26200.9974)
- Windows 11 Version 26H1 (before 10.0.28000.3501)
- Windows 11 Version 26H2 (before 10.0.26300.9974)
- Windows Server 2019, including Server Core (before 10.0.17763.9487)
- Windows Server 2022 (before 10.0.20348.5870)
- Windows Server 2025, including Server Core (before 10.0.26100.33822)
Fixed in
- The listed builds are the first fixed builds according to the CVE record.
- Confirm the exact fixed build and KB article per product in the MSRC advisory.
Workaround
Unknown.
Exploitation
- Not known to be exploited in the wild at publication.
- Microsoft rates exploit code maturity as unproven (E:U).
- No public proof of concept found.
- CISA SSVC: exploitation none, not automatable, total technical impact.
Our recommendation
- Inventory Windows 10, Windows 11 and Windows Server systems and check their build numbers against the list above.
- Confirm each system is still supported by Microsoft or covered by an extended update program.
- Install the November 2026 security updates on clients and servers, prioritizing shared workstations, terminal servers and systems with local user logon.
- Monitor the MSRC advisory, NVD and CISA KEV for changes in exploitation status.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Software Protection Platform (SPP)
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131085, KB5131090, KB5131096, KB5131080, KB5131077, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- CVE.org record CVE-2026-113748 www.cve.org
- Microsoft Security Response Center advisory CVE-2026-113748 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 11 Nov 2026, 04:13.
Original description (NVD)
Stack-based buffer overflow in Software Protection Platform (SPP) 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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