CVE-2025-27458

highpriority · track · 30OT risk · elevatedEPSS 0.002 · 10 %ileDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.21% (10th) EPSS
CVSS 7.5 · high
Is it mine?
5 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · endress_hauser_psirt

EPSS · scored 2026-10-27

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

  • MitigationEndress+Hauser MEAC300-FNADE4 all firmware versionssick_psirt

    Please make sure that you apply general security practices when operating the MEAC300-FNADE4. The following General Security Practices could mitigate the associated security risk.

  • MitigationEndress+Hauser MEAC300-FNADE4 all firmware versionsendress_hauser_psirt

    Please make sure that you apply general security practices when operating the MEAC300-FNADE4. The following General Security Practices could mitigate the associated security risk.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.16.5mediumAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU
v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nsecondary · ENISA EU
v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nsecondary · psirt@sick.deexploitability 2.8 · impact 3.6
v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nsecondary · SICK PSIRT DE
v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nsecondary · Endress+Hauser PSIRT DE
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-327USCWE-327USCWE-327USCWE-327US
05

affected products (5)

Products and version ranges known to be affected.

06

advisories (2)

Vendor and ecosystem advisories describing this.

  • SCA-2025-0008Multiple vulnerabilities in Endress+Hauser MEAC300-FNADE42025-07-03csaf · sick_psirtDE

    Several vulnerabilities in the Endress+Hauser MEAC300-FNADE4 were discovered, that can be accessed via Ethernet.

  • VDE-2025-036Multiple vulnerabilities in Endress+Hauser MEAC300-FNADE42025-03-06csaf · endress_hauser_psirtDE

    Several vulnerabilities in the Endress+Hauser MEAC300-FNADE4 were discovered, that can be accessed via Ethernet.

07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduendress_hauser_psirtnvdsick_psirtNVDCVE.orgMITRE
published 2025-07-03modified 2026-06-17
09

references (19)

External citations — patches, advisories, analysis.

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