Microsoft Copilot is widely deployed; remote code execution can lead to enterprise-wide compromise and operational disruption.
CVE-2026-48561
Remote command injection in Microsoft Copilot enabling remote code execution.
Is CVE-2026-48561 being exploited?
Not confirmed. CVE-2026-48561 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 0.86% probability of exploitation in the next 30 days.
How severe is CVE-2026-48561?
CVE-2026-48561 is rated Critical with a CVSS score of 9.6. 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-2026-48561?
Yes. A fix has been recorded for CVE-2026-48561. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-48561 affect?
CVE-2026-48561 affects Microsoft Copilot, Microsoft 365 Copilot integrations, Copilot-enabled clients and cloud services. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-48561?
Apply vendor patch immediately; if unavailable, disable Copilot integrations and restrict network access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote command injection allows unauthenticated attacker to execute arbitrary code, access data, and pivot across enterprise networks.
Immediate action required
- affected>= 1.0.0 and < publication
- affected>= 1.0.0 and < publication
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.