Loading vulnerability…
CVE-2025-59887 is a high-severity vulnerability in the Eaton UPS Companion (EUC) software installer caused by improper authentication/validation of library files during load. The installer loads a required library (DLL) from an insecure/uncontrolled search path, enabling search-order hijacking (malicious DLL substitution) if an attacker can tamper with or place a crafted library alongside/in a searched directory for the installer. Successful exploitation results in arbitrary code execution in the context of the installer process. Eaton’s advisory indicates EUC versions prior to 3.0 are affected and that the issue was fixed in EUC 3.0 (published/fixed Dec 26, 2025).
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.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity insecure library (DLL) loading issue in the Eaton UPS Companion installer that can enable arbitrary code execution if an attacker can tamper with or influence the software package/library search path.
Unknown
A high-severity improper authentication vulnerability in the Eaton UPS Companion software installer allows attackers with access to the software package to execute arbitrary code. The flaw is due to improper authentication of library files, leading to a risk of code execution during installation.
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.