CVE-2025-59689

Exp

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.

Published: 2025-09-19 Last update: 2025-11-05 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-59689 is rated Critical Active Threat (82.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.92%, 92th percentile). CISA KEV confirms active exploitation (added 2025-09-29) affecting Libraesva / Email Security Gateway. a weakness (CWE-77) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2025-59689

Name: Libraesva Email Security Gateway Command Injection Vulnerability · CISA KEV detail

Exploit added: 2025-09-29

Action due: 2025-10-20

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.

Exploit prediction scoring system (EPSS) score for CVE-2025-59689

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-06 6.01% 6.92% +0.91%
2 2026-04-15 6.92% 6.01% -0.91%
3 2026-03-28 — 6.92% —

Full EPSS history (21 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-59689

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]

Weakness enumeration for CVE-2025-59689

Affected software / configurations for CVE-2025-59689

Vendor Product Version Raw CPE
libraesva email_security_gateway >= 4.5, < 5.0.31 cpe:2.3:a:libraesva:email_security_gateway:*:*:*:*:*:*:*:*
libraesva email_security_gateway >= 5.1.0, < 5.1.20 cpe:2.3:a:libraesva:email_security_gateway:*:*:*:*:*:*:*:*
libraesva email_security_gateway >= 5.2.0, < 5.2.31 cpe:2.3:a:libraesva:email_security_gateway:*:*:*:*:*:*:*:*
libraesva email_security_gateway >= 5.3.0, < 5.3.16 cpe:2.3:a:libraesva:email_security_gateway:*:*:*:*:*:*:*:*
libraesva email_security_gateway >= 5.4.0, < 5.4.8 cpe:2.3:a:libraesva:email_security_gateway:*:*:*:*:*:*:*:*
libraesva email_security_gateway >= 5.5.0, < 5.5.7 cpe:2.3:a:libraesva:email_security_gateway:*:*:*:*:*:*:*:*

References for CVE-2025-59689

cvelogic Threat Intelligence