Home/CVE/Libraesva Email Security Gateway Command Injection Vulnerability
CVE

CVE-2025-59689

Libraesva Email Security Gateway Command Injection Vulnerability

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.

MEDIUM · CVSS 6.1 ⚠ CISA KEV EPSS 0.06011
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  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS percentile: top 9% of all CVEs by exploitation likelihood
Sigma rules0 YARA rules0
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Required Remediation

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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Weakness Classification

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
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Affected Products & Versions

6
libraesva email security gateway>= 4.5 and < 5.0.31
libraesva email security gateway>= 5.1.0 and < 5.1.20
libraesva email security gateway>= 5.2.0 and < 5.2.31
libraesva email security gateway>= 5.3.0 and < 5.3.16
libraesva email security gateway>= 5.4.0 and < 5.4.8
libraesva email security gateway>= 5.5.0 and < 5.5.7
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Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 Sep 2025 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
cisaKEV-CVE-2025-59689
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References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.libraesva.com/security-blog/Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59689US Government Resource
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