How severe is CVE-2025-27458?

CVE-2025-27458 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-27458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27458?

CVE-2025-27458 affects Endress Meac300-fnade4 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27458?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-27458 have an EU (EUVD) identifier?

Yes. CVE-2025-27458 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19870.

When was CVE-2025-27458 published?

CVE-2025-27458 was published on 2025-07-03 and last updated on 2026-06-17.

CVE-2025-27458

CVE-2025-27458 is a medium-severity vulnerability in Endress Meac300-fnade4 Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-327.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19870
Weakness: CWE-327
Affected product: Endress Meac300-fnade4 Firmware
Published: 2025-07-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-27458?: CVE-2025-27458 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-27458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27458?: CVE-2025-27458 affects Endress Meac300-fnade4 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27458?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-27458 have an EU (EUVD) identifier?: Yes. CVE-2025-27458 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19870.
When was CVE-2025-27458 published?: CVE-2025-27458 was published on 2025-07-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:endress:meac300-fnade4_firmware:*:*:*:*:*:*:*:*

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