Widely deployed Eaton UPS Companion installer; high risk due to arbitrary code execution via auth bypass.
CVE-2025-59887
Auth bypass in Eaton UPS Companion installer enables arbitrary code execution.
Is CVE-2025-59887 being exploited?
Not confirmed. CVE-2025-59887 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.27% probability of exploitation in the next 30 days.
How severe is CVE-2025-59887?
CVE-2025-59887 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-59887?
Yes. A fix has been recorded for CVE-2025-59887. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-59887 affect?
CVE-2025-59887 affects Eaton UPS Companion (EUC) installer, EUC software package. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-59887?
Upgrade to latest EUC installer version
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Code execution during installation via auth bypass if attacker has access to the installer package.
Patch immediately
- affected< 3.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.