CVE-2026-55145
CVE-2026-55145 is a medium-severity vulnerability in Microsoft Copilot with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.
Key facts
- Severity: Medium (CVSS 3.x base score 6.3)
- EPSS exploit prediction: 1% (43rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-77
- Affected product: Microsoft Copilot
- Published:
- Last modified:
Description
Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.
Frequently asked questions
- What is CVE-2026-55145?
- Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.
- How severe is CVE-2026-55145?
- CVE-2026-55145 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
- Is CVE-2026-55145 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-55145?
- CVE-2026-55145 affects Microsoft Copilot. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-55145?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2026-55145 published?
- CVE-2026-55145 was published on 2026-07-14 and last updated on 2026-07-22.
References
Affected products (1)
- cpe:2.3:a:microsoft:copilot:-:*:*:*:*:*:*:*
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