9.3crit
CVE-2026-80098
Copilot Studio Elevation of Privilege Vulnerability
Published 2 mo ago · modified 6 d ago · JSON
CVSS
9.3
v3.1 · CNA
CISA KEV
No
not known exploited
EPSS
0.5%
percentile 42%
Public exploits
0
none known
Summary
Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.
CISA SSVC assessment
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction (EPSS)
0.49% probability of exploitation in the next 30 days, higher than 42% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CNA | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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:N/S:C/C:L/I:H/A:N |
| NVD | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
Affected products
- Microsoft Microsoft Copilot Studio
Classification
- Weakness
- CWE-347 Improper Verification of Cryptographic Signature
References
- msrc.microsoft.com /update-guide/vulnerability/CVE-2026-80098 · vendor-advisory, patch
Sources
- CVE List: CVE-2026-80098
- NVD: CVE-2026-80098
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