CVE-2025-27458: CVE-2025-27458

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-03 · updated 2026-06-17
Weakness: CWE-327

Description

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.

Affected products

Endress+Hauser MEAC300-FNADE4: all versions

References

https://sick.com/psirt
https://sick.com/psirt
https://sick.com/psirt
https://sick.com/psirt
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
https://www.endress.com
https://www.first.org/cvss/calculator/3.1
https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json
https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf

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