Libraesva Email Security Gateway Command Injection Vulnerability (CVE-2025-59689)
Severity: medium · Patch status: unknown · Since 2025-09-29 · CVE-2025-59689
Libraesva Email Security Gateway (ESG) contains a command injection vulnerability which allows command injection via a compressed e-mail attachment. CISA added CVE-2025-59689 to its Known Exploited Vulnerabilities catalog on Sep 29, 2025, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Oct 20, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch