CVE-2025-27458

CVE-2025-27458

HIGH
7.5
CVSS Score
Published: July 3, 2025 at 11:33 AM UTC
Updated: June 17, 2026 at 09:03 AM UTC
2 products affected across 2 vendorsMEAC300 FNADE4 FirmwareMEAC300-FNADE4

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Severity
HIGH7.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
endress-meac300-fnade4 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

x_SICK PSIRT Security AdvisoriesVendor Advisoryx_SICK PSIRT Website
https://sick.com/psirt
x_ICS-CERT recommended practices on Industrial SecurityUS Government Resource
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
x_Endress+HauserProduct
https://www.endress.com
x_CVSS v3.1 CalculatorNot Applicable
https://www.first.org/cvss/calculator/3.1

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-327

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