CVE-2025-27458

Name: CVE-2025-27458
Creator: NVD / NIST
Published: 2025-07-03T12:15:23.917+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.17%

Last modified Jun 17, 2026

CVE-2025-27458 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.17%

6.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-327

Affected Software

Vendor	Product	Versions
Endress	Meac300-Fnade4 Firmware	All versions

References

https://sick.com/psirtVendor Advisory
https://sick.com/psirtVendor Advisory
https://sick.com/psirtVendor Advisory
https://sick.com/psirtVendor Advisory
https://www.cisa.gov/resources-tools/resources/ics-recommended-practicesUS Government Resource
https://www.endress.comProduct
https://www.first.org/cvss/calculator/3.1Not Applicable
https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.jsonVendor Advisory
https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdfVendor Advisory

Timeline

Published: Jul 3, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-27458?

How severe is CVE-2025-27458?

CVE-2025-27458 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.

How do I fix CVE-2025-27458?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-27458?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST