CVE-2025-27458 CVE-2025-27458
Weak VNC authentication allows attackers to derive passwords from unencrypted traffic, potentially leading to unauthorized access to industrial devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-27458?
CVE-2025-27458 is a medium-severity vulnerability in Endress+Hauser MEAC300-FNADE4, published on 3 Jul 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-327
Which versions are affected by CVE-2025-27458?
It affects 1 product.
Products include Endress Meac300-Fnade4 Firmware.
How do I fix CVE-2025-27458?
No fix has been published for CVE-2025-27458 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-27458 being exploited?
There is no known exploitation of CVE-2025-27458 in the wild and no public exploit code.
Other vulnerabilities in Endress+Hauser MEAC300-FNADE4
Sources
Also known as GHSA-hcwq-wcmg-w44r.