Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L L N U H L N 7.1 .0037 30.3 —
AFFECTED Product Versions Fixed Microsoft Copilot - – —
TIMELINE Jun 16 Reserved by microsoft Jul 14 Published (CNA: microsoft) Jul 22 RESCORED — CVE-2026-55145 (Microsoft Copilot). CVSS 6.3 → 7.1 (NVD).
Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.
| Date | Event | Detail |
|---|---|---|
| June 16, 2026 | Reserved | Reserved by microsoft |
| July 14, 2026 | Published | Published (CNA: microsoft) |
| July 22, 2026 | RESCORED | RESCORED — CVE-2026-55145 (Microsoft Copilot). CVSS 6.3 → 7.1 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Microsoft | Microsoft Copilot | — | - | — |
Authoritative record: CVE-2026-55145 at cve.org
Vendors: microsoft
Weaknesses: CWE-77
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-55145 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.