An issue was discovered in Znuny through 7.1.3.
Priority LOW 39CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-863.
Summary
An issue was discovered in Znuny through 7.1.3. If access to a ticket is not given, the content of S/MIME encrypted e-mail messages is visible to users with access to the CommunicationLog.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00362 30th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-26842
- 2026-10-03 Alias added: GHSA-c2x5-mpj8-v9v9
References
More Znuny vulnerabilities
- TI-2025-19719 An issue was discovered in Znuny before 7.1.4. CVSS 3.1CRITICAL 9.8
- TI-2025-19718 An Eval Injection issue was discovered in Znuny through 7.1.3. CVSS 3.1CRITICAL 9.8
- TI-2025-19717 An issue was discovered in Znuny through 7.1.3. CVSS 3.1CRITICAL 9.8
- TI-2025-19720 An issue was discovered in Znuny before 7.1.5. CVSS 3.1CRITICAL 9.1
- TI-2024-21383 An issue was discovered in Znuny and Znuny LTS 6.0.31 through 6.5.7 and Znuny 7.0.1… CVSS 3.1CRITICAL 9.8
- TI-2024-21385 An issue was discovered in Znuny LTS 6.5.1 through 6.5.7 and Znuny 7.0.1 through 7.0.16… CVSS 3.1HIGH 8.8
Sources
- CVE-2025-26842 · CVE Program
- CVE-2025-26842 · NVD
- FIRST EPSS
- GHSA-c2x5-mpj8-v9v9 · GitHub Advisory Database · CC BY 4.0
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