How severe is CVE-2026-2747?

CVE-2026-2747 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-2026-2747 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2747?

CVE-2026-2747 affects Seppmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2747?

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-2026-2747 have an EU (EUVD) identifier?

Yes. CVE-2026-2747 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9384.

When was CVE-2026-2747 published?

CVE-2026-2747 was published on 2026-03-04 and last updated on 2026-06-17.

CVE-2026-2747

CVE-2026-2747 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 6.9
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9384
Weakness: CWE-200
Affected product: Seppmail
Published: 2026-03-04
Last modified: 2026-06-17

Description

SEPPmail Secure Email Gateway before version 15.0.1 decrypts inline PGP messages without isolating them from surrounding unencrypted content, allowing exposure of sensitive information to an unauthorized actor.

Frequently asked questions

What is CVE-2026-2747?: SEPPmail Secure Email Gateway before version 15.0.1 decrypts inline PGP messages without isolating them from surrounding unencrypted content, allowing exposure of sensitive information to an unauthorized actor.
How severe is CVE-2026-2747?: CVE-2026-2747 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-2026-2747 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2747?: CVE-2026-2747 affects Seppmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2747?: 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-2026-2747 have an EU (EUVD) identifier?: Yes. CVE-2026-2747 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9384.
When was CVE-2026-2747 published?: CVE-2026-2747 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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