CVE-2026-24301 — Microsoft Copilot Web
As of 2026-08-18, CVE-2026-24301 is a HIGH-severity vulnerability in Microsoft Copilot Web, CVSS v3.1 8.8. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-24301, most recently “Critical Microsoft Copilot CoSnitch Vulnerability (CVE-2026-24301) Enabled One-Click Data Theft From Connected Accounts”.
Last updated: 2026-08-18
What is CVE-2026-24301?
Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.
The record classifies CVE-2026-24301 under weakness class CWE-77. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 36 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 4.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-08-18
Is CVE-2026-24301 being exploited?
No public exploitation evidence for CVE-2026-24301 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-08-18. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.
Affected products and versions
- Microsoft: Copilot Web
How to fix CVE-2026-24301
No vendor patch reference has been recorded for CVE-2026-24301 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-24301
1 tracked threat in the Threadlinqs corpus references CVE-2026-24301, either in the campaign’s CVE list or as an indicator on the campaign record.
- Critical Microsoft Copilot CoSnitch Vulnerability (CVE-2026-24301) Enabled One-Click Data Theft From Connected Accounts — CRITICAL · 2026-08-19
Sources
Enriched from CVE.org, NVD. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.
Vendor advisory and patch
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