CVE-2025-59689

Name: CVE-2025-59689
Creator: NVD / NIST
Published: 2025-09-19T20:15:40.34+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10Actively ExploitedEPSS 1.93%

Last modified Jun 17, 2026

CVE-2025-59689 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 1.93% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.93%

77.4th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Oct 20, 2025.

Weakness Enumeration

CWE-77

Affected Software

Vendor	Product	Versions
Libraesva	Email Security Gateway	>= 4.5, < 5.0.31
Libraesva	Email Security Gateway	>= 5.1.0, < 5.1.20
Libraesva	Email Security Gateway	>= 5.2.0, < 5.2.31
Libraesva	Email Security Gateway	>= 5.3.0, < 5.3.16
Libraesva	Email Security Gateway	>= 5.4.0, < 5.4.8
Libraesva	Email Security Gateway	>= 5.5.0, < 5.5.7

References

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-2025-59689US Government Resource

Timeline

Published: Sep 19, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-59689?

How severe is CVE-2025-59689?

CVE-2025-59689 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.93% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2025-59689?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-59689?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST