CVE-2026-55946 json
Microsoft Copilot Information Disclosure Vulnerability
published 2026-09-17 52 d ago modified 2026-10-31 8 d ago also EUVD-2026-82582
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
Ai command injection in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 50 d ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N |
| NVD | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- Microsoft Microsoft Copilot
Classification
- Weakness
-
- CWE-77 Improper Neutralization of Special Elements used in a Command
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-55946
vendor-advisory, patch
Sources
- CVE List CVE-2026-55946
- NVD CVE-2026-55946
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.