Loading vulnerability…
CVE-2026-33102 is an open redirect vulnerability in Microsoft 365 Copilot. Microsoft describes the issue as URL redirection to an untrusted site, classified as CWE-601, that allows an unauthorized attacker to elevate privileges over a network. The flaw could redirect a victim from a trusted Microsoft domain to an attacker-controlled site, creating a trusted-domain phishing and token-theft pathway across trust boundaries. Based on the provided context, the issue affected the cloud-hosted Microsoft 365 Copilot service and was remediated server-side by Microsoft before public disclosure. The CVSS v3.1 vector provided is AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
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.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An open redirect vulnerability in M365 Copilot that allows an unauthorized attacker to elevate privileges over a network.
A critical open redirect vulnerability in Microsoft 365 Copilot that could redirect users from a trusted Microsoft domain to an attacker-controlled site, enabling phishing and potential theft of credentials, OAuth tokens, or session data across trust boundaries.
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.