CVE-2025-59689
Published: September 29, 2025
Official Description
Libraesva Email Security Gateway (ESG) contains a command injection vulnerability which allows command injection via a compressed e-mail attachment.
CISA KEV Advisory
Libraesva Email Security Gateway Command Injection Vulnerability
Libraesva Email Security Gateway (ESG) contains a command injection vulnerability which allows command injection via a compressed e-mail attachment.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Risk Analysis
This vulnerability in Libraesva Email Security Gateway (ESG) allows for command injection through a compressed email attachment. Its presence in the KEV catalog indicates confirmed exploitation, making it a high-priority vulnerability.
This vulnerability is actively being exploited in the wild. The remote nature of email processing suggests it can be exploited remotely.
Administrators should apply the latest security updates for Libraesva Email Security Gateway (ESG) to prevent command injection.
Technical Analysis
CVE-2025-59689 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2025-59689 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-59689 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1