CVE-2026-26129
Improper neutralization of special elements in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.5
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
- EPSS probability
- 1.14%
- CWE
- CWE-138
- Published
- 2026-05-07
- Last modified
- 2026-08-10
Affected products
- Microsoft Microsoft 365 Copilot's Business Chat
Weakness type
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