CVE-2026-42827
published 2026-05-22CVE-2026-42827: Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information…
PriorityP350high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.50%
39.2th percentile
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_365_copilot | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
cvelistv5v3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
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GHSA
GHSA-3x26-xpc6-wm74: Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose inform
ghsa_unreviewed·2026-05-26
CVE-2026-42827 [MEDIUM] CWE-77 GHSA-3x26-xpc6-wm74: Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose inform
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.
VulDB
Microsoft 365 Copilot command injection
vuldb·2026-05-23
CVE-2026-42827 [CRITICAL] Microsoft 365 Copilot command injection
A vulnerability categorized as critical has been discovered in Microsoft 365 Copilot. This affects an unknown function. Executing a manipulation can lead to command injection.
This vulnerability is handled as CVE-2026-42827. The attack can be executed remotely. There is not any exploit available.
This product is available as a managed service. Users are not able to maintain vulnerability countermeasures themselves.
CVEList
M365 Copilot Information Disclosure Vulnerability
cvelistv5·2026-05-22·CVSS 6.5
CVE-2026-42827 [MEDIUM] CWE-77 M365 Copilot Information Disclosure Vulnerability
M365 Copilot Information Disclosure Vulnerability
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-05-22
Published