GFI MailEssentials up to 21.7 .NET Remoting Service deserialization

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in GFI MailEssentials up to 21.7. It has been rated as critical. This impacts an unknown function of the component .NET Remoting Service. The manipulation leads to deserialization. This vulnerability is referenced as CVE-2025-34489. The attack can only be performed from a local environment. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GFI MailEssentials up to 21.7. This issue affects an unknown function of the component .NET Remoting Service. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

GFI MailEssentials prior to version 21.8 is vulnerable to a local privilege escalation issue. A local attacker can escalate to NT Authority/SYSTEM by sending a crafted serialized payload to a .NET Remoting Service.

The weakness was published by Frycos. The advisory is shared at frycos.github.io. The identification of this vulnerability is CVE-2025-34489 since 04/15/2025. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

Upgrading to version 21.8 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector (VulnCheck): 🔍

CVSSv2info

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

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: MailEssentials 21.8

Timelineinfo

04/15/2025 🔍
04/28/2025 +13 days 🔍
04/28/2025 +0 days 🔍
05/10/2025 +12 days 🔍

Sourcesinfo

Advisory: frycos.github.io
Researcher: Frycos
Status: Confirmed

CVE: CVE-2025-34489 (🔍)
GCVE (CVE): GCVE-0-2025-34489
GCVE (VulDB): GCVE-100-306425

Entryinfo

Created: 04/28/2025 21:35
Updated: 05/10/2025 06:11
Changes: 04/28/2025 21:35 (64), 05/10/2025 06:11 (14)
Complete: 🔍
Cache ID: 216::103

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