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Exploited in the wild: confirmed by the CISA KEV catalog, not predicted.
Fixed by KB5122876 and 5 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.
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Patch tracker / CVE reference / CVE-2026-85880

CVE-2026-85880

CVE-2026-85880 is a Microsoft vulnerability with a CVSS score of 9.8 (High). It is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it in the wild, which makes it a fix-first item. Microsoft has shipped the fix: deploy one of the 6 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

HighCISA KEV
9.8
CVSS v3
3.6%
EPSS, 30 days
High
Severity
Yes
Exploited in the wild

Listed in the CISA Known Exploited Vulnerabilities catalog, confirmed exploited in the wild. EPSS exploit probability 3.6%. CVSS 9.8 (High).

This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability, and one of 2 actively-exploited CVEs in September 2026.

Senserva Watchevery change we have recorded for this one
What changed, and when

CISA confirmed active exploitation of CVE-2026-85880 on 2026-09-08.

0%25%50%75%100%CISA KEVCISA KEV on 2026-09-082026-09-09: EPSS 0.0%2026-09-10: EPSS 1.7%2026-09-16: EPSS 1.7%EPSS 1.7%2026-09-082026-09-16

Drawn by Senserva Vivid from the Senserva change record. Hover any point for its date and value.

  • 2026-09-08 added to the CISA KEV catalog by CISA
  • 2026-09-09 EPSS first scored at 0.0%
  • 2026-09-10 EPSS 0.0% to 1.7%

Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.

Senserva AI Opinion and rich prompt for CVE-2026-85880

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

Official patch(es) for CVE-2026-85880

Treat as urgent: it is being exploited in the wild (CISA KEV), so patch ahead of items that are not. In Intune or Defender, confirm whether the fixing updates KB5122876, KB5122878, KB5122882, KB5123065, KB5123066, KB5123099 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Apply the Microsoft security updates below to fix CVE-2026-85880. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.

KB5122876KB5122878KB5122882KB5123065KB5123066KB5123099

Scope and sources

Affected products
Fixed by the same updates
CVE-2026-68830CVE-2026-68831CVE-2026-68839CVE-2026-68843CVE-2026-68849CVE-2026-68851CVE-2026-68852CVE-2026-68874
Authoritative references
Official CVE record (cve.org)NVD detailMicrosoft MSRCCISA KEV catalogFIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.

New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
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