by Kastro
Paper/Archive/CVE-2026-80098

CVE-2026-80098

Microsoft Microsoft Copilot Studio — Copilot Studio Elevation of Privilege Vulnerability

EPSS 0.5%CVSS 9.3
critical.is priorityof 100
36
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 41.9.419 × 208.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.

Affected

ProductAffectedFixed inSource
Microsoft Copilot Studio-–CNA

Scores by source

microsoft (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N/E:U/RL:O/RC:C
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-80098