CVE-2026-27441
CVE-2026-27441 is a critical-severity vulnerability in Seppmail with a CVSS 3.x base score of 9.8. 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-78.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v4: 9.5
- EPSS exploit prediction: 1% (45th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-9377
- Weakness: CWE-78
- Affected product: Seppmail
- Published:
- Last modified:
Description
SEPPmail Secure Email Gateway before version 15.0.1 insufficiently neutralizes the PDF encryption password, allowing OS command execution.
Frequently asked questions
- What is CVE-2026-27441?
- SEPPmail Secure Email Gateway before version 15.0.1 insufficiently neutralizes the PDF encryption password, allowing OS command execution.
- How severe is CVE-2026-27441?
- CVE-2026-27441 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-27441 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-27441?
- CVE-2026-27441 affects Seppmail. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-27441?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-27441 have an EU (EUVD) identifier?
- Yes. CVE-2026-27441 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9377.
- When was CVE-2026-27441 published?
- CVE-2026-27441 was published on 2026-03-04 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:seppmail:seppmail:*:*:*:*:*:*:*:*
More vulnerabilities in Seppmail
- CVE-2026-2743 — Critical (CVSS 9.8): Arbitrary File Write via Path Traversal upload to Remote Code Execution in SeppMail User Web Interface. The affected…
- CVE-2026-2747 — High (CVSS 7.5): SEPPmail Secure Email Gateway before version 15.0.1 decrypts inline PGP messages without isolating them from…
- CVE-2026-27444 — High (CVSS 7.5): SEPPmail Secure Email Gateway before version 15.0.1 incorrectly interprets email addresses in the email headers,…
- CVE-2026-27443 — High (CVSS 7.5): SEPPmail Secure Email Gateway before version 15.0.1 does not properly sanitize the headers from S/MIME protected MIME…
- CVE-2026-27442 — High (CVSS 7.5): The GINA web interface in SEPPmail Secure Email Gateway before version 15.0.1 does not properly check attachment…
- CVE-2021-31740 — Medium (CVSS 6.1): SEPPMail's web frontend, user input is not embedded correctly in the web page and therefore leads to cross-site…
Other CWE-78 (OS Command Injection) vulnerabilities
- CVE-2026-100382 — Critical (CVSS 10.0): Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Wikimedia…
- CVE-2026-77521 — Critical (CVSS 10.0): MaxKB is an open-source AI assistant for enterprise. Prior to version 2.10.5-lts, assistants with a tool, MCP tool,…
- CVE-2026-82004 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an OS Command ('OS…
- CVE-2026-76197 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an OS Command ('OS…
- CVE-2026-76195 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an OS Command ('OS…
- CVE-2026-19188 — Critical (CVSS 10.0): A critical OS command injection vulnerability has been identified in the Haiwell IoT Cloud HMI Gateway product. The…