Vulnerability in Endress Meac300-Fnade4
CVE-2025-27458
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.
Vulnerability class: POODLE (CVE-2014-3566)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (9.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Endress Meac300-Fnade4
- Endress Meac300-Fnade4 Firmware
- Endress+hauser Meac300-Fnade4 — versions vers:all/*
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.endress.com (Product, x_Endress+Hauser)
- sick.com/psirt (x_SICK PSIRT Security Advisories, Vendor Advisory)
- www.cisa.gov/resources-tools/resources/ics-recommended-practices (US Government Resource, x_ICS-CERT recommended practices on Industrial Security)
- www.first.org/cvss/calculator/3.1 (x_CVSS v3.1 Calculator, Not Applicable)
- www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json (x_The canonical URL., Vendor Advisory)
- www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-27458?
- CVE-2025-27458 is a medium-severity vulnerability in Endress Meac300-Fnade4, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 6.5/10. Published 2025-07-03.
- How severe is CVE-2025-27458?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-27458 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.