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High 7.8Known exploited (CISA KEV)Published Sep 8, 2026
CVE-2026-85880Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Windows 10 Version 1607 and 8 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Sep 8, 2026; federal agencies had to remediate by Sep 22, 2026. Treat that date as your deadline.
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Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
- Weakness (CWE)
- CWE-122, CWE-908
- Known exploited
- Added to CISA KEV Sep 8, 2026; federal remediation due Sep 22, 2026Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- EPSS (exploitation in the next 30 days)
- 3.62% (percentile 89)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Windows 10 Version 1607 microsoft:windows_10_1607 | from 10.0.14393.0 before 10.0.14393.9512 | CNA record |
Microsoft Windows 10 Version 1809 microsoft:windows_10_1809 | from 10.0.17763.0 before 10.0.17763.9245 | CNA record |
Microsoft Windows 10 Version 21H2 microsoft:windows_10_21h2 | from 10.0.19044.0 before 10.0.19044.7725 | CNA record |
Microsoft Windows 10 Version 22H2 microsoft:windows_10_22h2 | from 10.0.19045.0 before 10.0.19045.7725 | CNA record |
Microsoft Windows Server 2012 microsoft:windows_server_2012 (from the name) | from 6.2.9200.0 before 6.2.9200.26349 | CNA record |
Microsoft Windows Server 2012 R2 microsoft:windows_server_2012_r2 (from the name) | from 6.3.9600.0 before 6.3.9600.23398 | CNA record |
Microsoft Windows Server 2016 microsoft:windows_server_2016 (from the name) | from 10.0.14393.0 before 10.0.14393.9512 | CNA record |
Microsoft Windows Server 2019 microsoft:windows_server_2019 (from the name) | from 10.0.17763.0 before 10.0.17763.9245 | CNA record |
Microsoft Windows Server 2022 microsoft:windows_server_2022 (from the name) | from 10.0.20348.0 before 10.0.20348.5622 | CNA record |
microsoft windows_10_1607 microsoft:windows_10_1607 | before 10.0.14393.9512; before 10.0.14393.9512 | NVD |
microsoft windows_10_1809 microsoft:windows_10_1809 | before 10.0.17763.9245; before 10.0.17763.9245 | NVD |
microsoft windows_10_21h2 microsoft:windows_10_21h2 | before 10.0.19044.7725; before 10.0.19044.7725; before 10.0.19044.7725 | NVD |
microsoft windows_10_22h2 microsoft:windows_10_22h2 | before 10.0.19045.7725; before 10.0.19045.7725; before 10.0.19045.7725 | NVD |
microsoft windows_server_2012 microsoft:windows_server_2012 | all versions; r2 | NVD |
microsoft windows_server_2016 microsoft:windows_server_2016 | before 10.0.14393.9512 | NVD |
microsoft windows_server_2019 microsoft:windows_server_2019 | before 10.0.17763.9245 | NVD |
microsoft windows_server_2022 microsoft:windows_server_2022 | before 10.0.20348.5622 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85880vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.