How severe is CVE-2025-34421?

CVE-2025-34421 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-34421 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34421?

CVE-2025-34421 affects Mailenable. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-34421?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-34421 have an EU (EUVD) identifier?

Yes. CVE-2025-34421 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202435.

When was CVE-2025-34421 published?

CVE-2025-34421 was published on 2025-12-10 and last updated on 2026-06-17.

CVE-2025-34421

CVE-2025-34421 is a high-severity vulnerability in Mailenable with a CVSS 3.x base score of 7.8. 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-427.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.5
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-202435
Weakness: CWE-427
Affected product: Mailenable
Published: 2025-12-10
Last modified: 2026-06-17

Description

MailEnable versions prior to 10.54 contain an unsafe DLL loading vulnerability that can lead to local arbitrary code execution. The MailEnable administrative executable attempts to load MEAISP.DLL from its installation directory without sufficient integrity validation or a secure search order. A local attacker with write access to that directory can plant a malicious MEAISP.DLL, which is then loaded on execution, resulting in attacker-controlled code running with the privileges of the process.

Frequently asked questions

What is CVE-2025-34421?: MailEnable versions prior to 10.54 contain an unsafe DLL loading vulnerability that can lead to local arbitrary code execution. The MailEnable administrative executable attempts to load MEAISP.DLL from its installation directory without sufficient integrity validation or a secure search order. A local attacker with write access to that directory can plant a malicious MEAISP.DLL, which is then loaded on execution, resulting in attacker-controlled code running with the privileges of the process.
How severe is CVE-2025-34421?: CVE-2025-34421 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-34421 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34421?: CVE-2025-34421 affects Mailenable. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-34421?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-34421 have an EU (EUVD) identifier?: Yes. CVE-2025-34421 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202435.
When was CVE-2025-34421 published?: CVE-2025-34421 was published on 2025-12-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mailenable:mailenable:*:*:*:*:standard:*:*:*

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Other CWE-427 (Uncontrolled Search Path Element) vulnerabilities

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