CVE-2025-59689
Libraesva Email Security Gateway Command Injection Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Email Security Gateway, fix it now.
CISA 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.
US federal civilian agencies must remediate by Oct 20, 2025.
Patch status
No official fix confirmed yet
Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Affected products
| Product | Vendor | Affected versions | Fixed in | Source |
|---|---|---|---|---|
| Email Security Gateway | Libraesva | >= 4.5, < 5.0.31; >= 5.1.0, < 5.1.20; >= 5.2.0, < 5.2.31; >= 5.3.0, < 5.3.16; >= 5.4.0, < 5.4.8; >= 5.5.0, < 5.5.7 | 5.0.31; 5.1.20; 5.2.31; 5.3.16; 5.4.8; 5.5.7 | KEV |
Sources: KEV = CISA Known Exploited Vulnerabilities catalog.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdateKEV
CVE-2025-59689 scored CVSS 6.1: Libraesva Email Security Gateway, Libraesva Email Security Gateway Command Injection Vulnerability
CISA lists this as exploited in the wild. Unpatched Email Security Gateway systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
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Coverage
We have not published a story about this vulnerability yet.