CVE-2025-59689
Actively exploited. CVE-2025-59689 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-09-29) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Libraesva Email Security Gateway (ESG) contains a command injection vulnerability which allows command injection via a compressed e-mail attachment.
CSIRTS triage
- What
- The vulnerability allows command injection via a compressed e-mail attachment.
- Who is affected
- Deployments of Libraesva Email Security Gateway that process compressed email attachments.
- Urgency
- Immediate remediation is necessary as the vulnerability is actively exploited and rated critical.
- Action
- Update to the latest version of the Email Security Gateway.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 78% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2025-59689: Libraesva Email Security Gateway Command Injection Vulnerabilitycisa-kev · 2025-09-29
External references
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