Endress+Hauser MEAC300-FNADE4 VNC Authentication risky encryption

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Endress+Hauser MEAC300-FNADE4. It has been declared as problematic. This vulnerability affects unknown code of the component VNC Authentication. Such manipulation leads to risky encryption. This vulnerability is listed as CVE-2025-27458. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Endress+Hauser MEAC300-FNADE4 (version now known). Affected by this issue is some unknown processing of the component VNC Authentication. The manipulation with an unknown input leads to a risky encryption vulnerability. Using CWE to declare the problem leads to CWE-327. The product uses a broken or risky cryptographic algorithm or protocol. Impacted is confidentiality. CVE summarizes:

The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.

This vulnerability is handled as CVE-2025-27458 since 02/26/2025. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. 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 T1600.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-19870). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.7

VulDB Base Score: 3.1
VulDB Temp Score: 3.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 6.5
CNA Vector (SICK AG): 🔒

CVSSv2info

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

Exploitinginfo

Class: Risky encryption
CWE: CWE-327 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

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: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/26/2025 CVE reserved
07/03/2025 +126 days Advisory disclosed
07/03/2025 +0 days VulDB entry created
02/06/2026 +218 days VulDB entry last update

Sourcesinfo

Status: Not defined

CVE: CVE-2025-27458 (🔒)
GCVE (CVE): GCVE-0-2025-27458
GCVE (VulDB): GCVE-100-314768
EUVD: 🔒

Entryinfo

Created: 07/03/2025 15:59
Updated: 02/06/2026 17:36
Changes: 07/03/2025 15:59 (60), 07/03/2025 17:17 (1), 02/06/2026 17:36 (12)
Complete: 🔍
Cache ID: 216:2F3:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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