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CVE-2026-45586 is a local elevation-of-privilege vulnerability in the Windows Collaborative Translation Framework, including the CTFMON/ctfmon.exe component. The flaw is caused by improper link resolution before file access ('link following'), allowing the vulnerable component to follow a link to an unintended file or resource during privileged file operations. Microsoft classifies the issue as an Important-severity EoP vulnerability with CVSS 3.1 base score 7.8. Public reporting associates the issue with the name GreenPlasma. Successful exploitation allows a locally authorized attacker with low privileges and no user interaction to elevate to SYSTEM on affected Windows systems.
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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.
40 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft Defender vulnerability previously disclosed by the same researcher and addressed during June Patch Tuesday.
Publicly disclosed 0-day vulnerability referenced as GreenPlasma.
A zero-day elevation-of-privilege vulnerability in Windows CTFMON that can grant SYSTEM privileges.
Уязвимость повышения привилегий в продуктах Microsoft, публично раскрытая до выхода патча.
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.