Microsoft Copilot Studio is widely used; crypto signature bypass enables remote privilege escalation affecting enterprise deployments.
CVE-2026-80098
Signature verification bypass in Microsoft Copilot Studio enables network privilege escalation.
Is CVE-2026-80098 being exploited?
Not confirmed. CVE-2026-80098 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2026-80098?
CVE-2026-80098 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-80098?
Yes. A fix has been recorded for CVE-2026-80098. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-80098 affect?
CVE-2026-80098 affects Microsoft Copilot Studio, Copilot integrations and deployments. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-80098?
Apply Microsoft patch immediately; restrict access and rotate keys.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote privilege escalation: attackers can forge cryptographic signatures to gain elevated/admin access to Copilot Studio resources over the network.
Immediate action required