CVE-2026-42895
CVE-2026-42895 is a medium-severity vulnerability in Microsoft 365 Copilot with a CVSS 3.x base score of 6.5. 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 6.5)
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-38087
- Weakness: CWE-77
- Affected product: Microsoft 365 Copilot
- Published:
- Last modified:
Description
Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.
Frequently asked questions
- What is CVE-2026-42895?
- Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.
- How severe is CVE-2026-42895?
- CVE-2026-42895 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2026-42895 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-42895?
- CVE-2026-42895 affects Microsoft 365 Copilot. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-42895?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-42895 have an EU (EUVD) identifier?
- Yes. CVE-2026-42895 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38087.
- When was CVE-2026-42895 published?
- CVE-2026-42895 was published on 2026-06-19 and last updated on 2026-06-26.
References
Affected products (1)
- cpe:2.3:a:microsoft:365_copilot:-:*:*:*:*:*:*:*
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