CVEs / CVE-2025-59689
CVE-2025-59689: Libraesva Email Security Gateway Command Injection Vulnerability
- Known exploited in the CISA KEV catalog since 29 Sep 2025
- medium 6.1 CVSS 3.1 (from the CNA)
- EPSS 1.95% chance of exploitation in the next 30 days, higher than 80% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Libraesva Email Security Gateway (ESG) contains a command injection vulnerability which allows command injection via a compressed e-mail attachment.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Libraesva Email Security Gateway | from 4.5, before 5.0.31 | 5.0.31 |
| Libraesva Email Security Gateway | from 5.1, before 5.1.20 | 5.1.20 |
| Libraesva Email Security Gateway | from 5.2, before 5.2.31 | 5.2.31 |
| Libraesva Email Security Gateway | from 5.3, before 5.4.8 | 5.4.8 |
| Libraesva Email Security Gateway | from 5.5, before 5.5.7 | 5.5.7 |
Exploitation
| In CISA KEV since | 29 Sep 2025 |
|---|---|
| Due date for US federal agencies | 20 Oct 2025 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 6.1 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-77 |
References
- CVE-2025-59689 on NVD
- CVE-2025-59689 in the CISA KEV catalog
- https://docs.libraesva.com/knowledgebase/security-advisory-command-injection-vulnerability-cve-2025-59689/ (cited by CISA)
- https://docs.libraesva.com/knowledgebase/security-advisory-command-injection-vulnerability-cve-2025-59689/ Vendor Advisory
- https://www.libraesva.com/security-blog/ Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59689 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
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