Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-24301

CVE-2026-24301HIGH

Microsoft Copilot Information Disclosure Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  N  N    7.5   .0409   90.4     —

AFFECTED
  Product      Versions  Fixed
  Copilot Web  - –       —

TIMELINE
  Jan 21  Reserved by microsoft
  Aug 18  Published (CNA: microsoft)
  Sep 10  RESCORED — CVE-2026-24301 (Microsoft Copilot Web). CVSS 8.8 → 7.5 (NVD).

CWE-77 · CNA: microsoft · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
January 21, 2026	Reserved	Reserved by microsoft
August 18, 2026	Published	Published (CNA: microsoft)
September 10, 2026	RESCORED	RESCORED — CVE-2026-24301 (Microsoft Copilot Web). CVSS 8.8 → 7.5 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Copilot Web	—	-	—

Weaknesses

CWE-77

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24301 [vendor-advisory, patch]

Authoritative record: CVE-2026-24301 at cve.org

Vendors: microsoft

Weaknesses: CWE-77

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-24301 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.