CVE-2025-27457Network attack vector

Sensitive-data disclosure via unencrypted VNC sessions

Published Jul 3, 2025 · Updated Jul 3, 2025

Cleartext VNC transport in Endress+Hauser MEAC300-FNADE4 all versions allows man-in-the-middle attackers to read intercepted session data. The VNC server and clients exchange the entire remote-display session without transport encryption, exposing its contents to passive capture. Exploitation requires an active VNC client session and network visibility of its traffic; no integrity or availability impact is reported.

CVSS severity6.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cleartext VNC transport in Endress+Hauser MEAC300-FNADE4 all versions allows man-in-the-middle attackers to read intercepted session data. The VNC server and clients exchange the entire remote-display session without transport encryption, exposing its contents to passive capture. Exploitation requires an active VNC client session and network visibility of its traffic; no integrity or availability impact is reported.

The record

CVE
CVE-2025-27457
Published
Jul 3, 2025
Updated
Jul 3, 2025
Vendor
Endress+Hauser
Product
MEAC300
Classifications
CWE-319, CAPEC-117, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=vers:all/*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Endress+Hauser · MEAC300version=vers:all/*

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.5SICK AGCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
CAPEC-117Interception
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo