How severe is CVE-2025-40653?

CVE-2025-40653 has a CVSS 4.0 base score of 6.9, rated medium severity.

Is CVE-2025-40653 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-40653?

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

Does CVE-2025-40653 have an EU (EUVD) identifier?

Yes. CVE-2025-40653 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27975.

When was CVE-2025-40653 published?

CVE-2025-40653 was published on 2025-05-26 and last updated on 2026-06-17.

CVE-2025-40653

CVE-2025-40653 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.9. 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-209.

Key facts

Severity: Medium (CVSS 4.0 base score 6.9)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27975
Weakness: CWE-209
Published: 2025-05-26
Last modified: 2026-06-17

Description

User enumeration vulnerability in M3M Printer Server Web. This issue occurs during user authentication, where a difference in error messages could allow an attacker to determine whether a username is valid or not, allowing a brute force attack on valid usernames.

Frequently asked questions

What is CVE-2025-40653?: User enumeration vulnerability in M3M Printer Server Web. This issue occurs during user authentication, where a difference in error messages could allow an attacker to determine whether a username is valid or not, allowing a brute force attack on valid usernames.
How severe is CVE-2025-40653?: CVE-2025-40653 has a CVSS 4.0 base score of 6.9, rated medium severity.
Is CVE-2025-40653 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-40653?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-40653 have an EU (EUVD) identifier?: Yes. CVE-2025-40653 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27975.
When was CVE-2025-40653 published?: CVE-2025-40653 was published on 2025-05-26 and last updated on 2026-06-17.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/user-enumeration-m3m-printer-server-web

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