September 29, 2025 · Applied Cybernetics Group
CVE-2025-59689 — Libraesva Email Security Gateway
Libraesva Email Security Gateway Command Injection Vulnerability
- Added to KEV
2025-09-29- Federal due date
2025-10-20- Vendor
- Libraesva
- Product
- Email Security Gateway
- EPSS
- 77.6th percentile (score 0.019, as of
2026-07-13) - NVD CVSS v3.1
- 6.1 (MEDIUM)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2025-59689
CISA short description
Libraesva Email Security Gateway (ESG) contains a command injection vulnerability which allows command injection via a compressed e-mail attachment.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
NVD description
Libraesva ESG 4.5 through 5.5.x before 5.5.7 allows command injection via a compressed e-mail attachment. For ESG 5.0 a fix has been released in 5.0.31. For ESG 5.1 a fix has been released in 5.1.20. For ESG 5.2 a fix has been released in 5.2.31. For ESG 5.4 a fix has been released in 5.4.8. For ESG 5.5. a fix has been released in 5.5.7.