How severe is CVE-2026-27442?

CVE-2026-27442 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-27442 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27442?

CVE-2026-27442 affects Seppmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27442?

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-2026-27442 have an EU (EUVD) identifier?

Yes. CVE-2026-27442 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9378.

When was CVE-2026-27442 published?

CVE-2026-27442 was published on 2026-03-04 and last updated on 2026-06-17.

CVE-2026-27442

CVE-2026-27442 is a high-severity vulnerability in Seppmail with a CVSS 3.x base score of 7.5. 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 9.3
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9378
Weakness: CWE-22
Affected product: Seppmail
Published: 2026-03-04
Last modified: 2026-06-17

Description

The GINA web interface in SEPPmail Secure Email Gateway before version 15.0.1 does not properly check attachment filenames in GINA-encrypted emails, allowing an attacker to access files on the gateway.

Frequently asked questions

What is CVE-2026-27442?: The GINA web interface in SEPPmail Secure Email Gateway before version 15.0.1 does not properly check attachment filenames in GINA-encrypted emails, allowing an attacker to access files on the gateway.
How severe is CVE-2026-27442?: CVE-2026-27442 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-27442 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27442?: CVE-2026-27442 affects Seppmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27442?: 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-2026-27442 have an EU (EUVD) identifier?: Yes. CVE-2026-27442 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9378.
When was CVE-2026-27442 published?: CVE-2026-27442 was published on 2026-03-04 and last updated on 2026-06-17.

References

https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#seppmail-vulnerability-disclosure

Affected products (1)

cpe:2.3:a:seppmail:seppmail:*:*:*:*:*:*:*:*

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