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A remote code execution vulnerability in Microsoft Management Console (MMC) involving the handling of Microsoft Saved Console (MSC) files. The flaw allows a specially crafted, untrusted MSC file to execute code when opened or loaded by a user on a vulnerable Windows system. Public reporting and vendor guidance indicate the issue was actively exploited in the wild and has been associated with the GrimResource technique. Microsoft’s fix changes MMC behavior to prevent untrusted MSC files from being opened.
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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.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A moderate-severity remote code execution vulnerability in Microsoft Management Console that Microsoft says is under exploitation in the wild.
A remote code execution vulnerability in Microsoft Management Console (mmc.exe) that can be exploited via malicious MSC files, allowing attackers to execute arbitrary code on targeted endpoints.
A remote code execution vulnerability in Microsoft Management Console (MMC) that is being actively exploited.
An actively exploited zero-day remote code execution vulnerability in Microsoft Management Saved Console via MSC files.
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.