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CVE-2026-85885 is a command-injection vulnerability in Microsoft 365 Copilot caused by improper neutralization of special elements used in commands. An authorized low-privileged attacker can submit crafted command input over the network to obtain elevated privileges. The vulnerability is an exclusively hosted-service issue and has a CVSS v3.1 score of 9.9 with vector AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A command-injection flaw in Microsoft 365 Copilot that permits an authorized attacker to elevate privileges and expand data access beyond normal authorization scope.
A command-injection vulnerability in M365 Copilot that permits an authorized attacker to elevate privileges over a network.
A command-injection vulnerability in Microsoft 365 Copilot that allows an authorized network attacker to elevate privileges. It has a CVSS v3.1 vector of AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H and is classified as CWE-77.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.