Libraesva Email Security Gateway up to 5.5.6 E-Mail Attachment command injection

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Libraesva Email Security Gateway up to 5.0.30/5.1.19/5.2.30/5.4.7/5.5.6. This impacts an unknown function of the component E-Mail Attachment Handler. The manipulation results in command injection. This vulnerability is reported as CVE-2025-59689. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Libraesva Email Security Gateway up to 5.0.30/5.1.19/5.2.30/5.4.7/5.5.6. Affected is an unknown code block of the component E-Mail Attachment Handler. The manipulation with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at libraesva.com. This vulnerability is traded as CVE-2025-59689 since 09/18/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1202.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 282475 (Libraesva ESG 4.5 < 5.0.31 / 5.1.20 / 5.2.31 / 5.3.16 / 5.4.8 / 5.5.7 Command Injection (CVE-2025-59689)), which helps to determine the existence of the flaw in a target environment. This issue was added on 09/29/2025 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 10/20/2025:

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

Upgrading to version 5.0.31, 5.1.20, 5.2.31, 5.4.8 or 5.5.7 eliminates this vulnerability.

The vulnerability is also documented in the databases at Zero-Day.cz (1033), CNNVD (CNNVD-202509-3161), Tenable (282475) and EUVD (EUVD-2025-30249). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.1
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Attacked

EPSS Score: 🔒
EPSS Percentile: 🔒

KEV Added: 🔒
KEV Due: 🔒
KEV Remediation: 🔒
KEV Ransomware: 🔒
KEV Notice: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 282475
Nessus Name: Libraesva ESG 4.5 < 5.0.31 / 5.1.20 / 5.2.31 / 5.3.16 / 5.4.8 / 5.5.7 Command Injection (CVE-2025-59689)

Zero-Day.cz: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Email Security Gateway 5.0.31/5.1.20/5.2.31/5.4.8/5.5.7

Timelineinfo

09/18/2025 CVE reserved
09/20/2025 +2 days Advisory disclosed
09/20/2025 +0 days VulDB entry created
01/08/2026 +110 days VulDB entry last update

Sourcesinfo

Advisory: libraesva.com
Status: Confirmed

CVE: CVE-2025-59689 (🔒)
GCVE (CVE): GCVE-0-2025-59689
GCVE (VulDB): GCVE-100-325092
EUVD: 🔒
CNNVD: CNNVD-202509-3161 - Libraesva Email Security Gateway 安全漏洞

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/20/2025 08:48
Updated: 01/08/2026 21:53
Changes: 09/20/2025 08:48 (65), 09/20/2025 18:38 (1), 09/22/2025 17:36 (6), 09/26/2025 07:33 (6), 09/29/2025 23:07 (9), 01/08/2026 21:53 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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