CVE-2026-24307 json
M365 Copilot Information Disclosure Vulnerability
published 2026-01-22 9 mo ago modified 2026-07-30 3 mo ago also EUVD-2026-4497
- cvss
- 9.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 9 mo ago
Exploit prediction
0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C |
| CNA | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- Microsoft Microsoft 365 Copilot
Classification
- Weakness
-
- CWE-1287 Improper Validation of Specified Type of Input
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-24307
vendor-advisory, patch
Sources
- CVE List CVE-2026-24307
- NVD CVE-2026-24307
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