Command injection in Libraesva Email Security Gateway
Priority CRITICAL 86Exploited in the wildCWE-77Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-77.
Summary
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.
Why it matters now
Exploitation Active In CISA KEV since 2025-09-29CISA due date 2025-10-20
EPSS 0.01956 80th percentileScored 2026-11-07
Fix Fixed Email Security Gateway (Libraesva): 5.0.31, 5.1.20, 5.2.31 +2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Libraesva | Email Security Gateway | 4.5 to before 5.0.31; 5.1 to before 5.1.20; 5.2 to before 5.2.31; 5.3 to before 5.4.8; 5.5 to before 5.5.7 | 5.0.31, 5.1.20, 5.2.31, 5.4.8, 5.5.7 | Patch available | CNA |
- Email Security Gateway VendorLibraesva Affected 4.5 to before 5.0.31; 5.1 to before 5.1.20; 5.2 to before 5.2.31; 5.3 to before 5.4.8; 5.5 to before 5.5.7 Fixed in 5.0.31, 5.1.20, 5.2.31, 5.4.8, 5.5.7 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libraesva:email_security_gateway:*:*:*:*:*:*:*:* | 4.5 to before 5.0.31; 5.1.0 to before 5.1.20; 5.2.0 to before 5.2.31; 5.3.0 to before 5.3.16; 5.4.0 to before 5.4.8; 5.5.0 to before 5.5.7 | Vulnerable | Libraesva |
- cpe:2.3:a:libraesva:email_security_gateway:*:*:*:*:*:*:*:* Versions 4.5 to before 5.0.31; 5.1.0 to before 5.1.20; 5.2.0 to before 5.2.31; 5.3.0 to before 5.3.16; 5.4.0 to before 5.4.8; 5.5.0 to before 5.5.7 Vulnerable ·Libraesva
Remediation
- Fix · CNA Email Security Gateway (Libraesva) Fixed in 5.0.31, 5.1.20, 5.2.31, 5.4.8, 5.5.7
Timeline
- 2025-09-29 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2025-59689
- 2026-10-03 Alias added: GHSA-363h-22w6-hcrm
References
Sources
- CVE-2025-59689 · CVE Program
- CVE-2025-59689 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-363h-22w6-hcrm · GitHub Advisory Database · CC BY 4.0
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