CVE-2025-26842

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.

Published: 2025-05-08 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-26842 is rated Moderate Risk (48.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.29%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-26842

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-04 0.05% 0.29% +0.23%
2 2026-01-11 0.05% 0.05% +0.00%
3 2025-12-12 — 0.05% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-26842

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-26842

OS Trackers for CVE-2025-26842

vendor priority summary link
debian not yet assigned CVE-2025-26842 not yet assigned priority: Debian including 1 source packages (znuny), 4 status rows across 4 suites (bookworm, forky, sid, trixie): resolved 3, open 1. https://security-tracker.debian.org/tracker/CVE-2025-26842
ubuntu medium CVE-2025-26842 medium priority: Ubuntu including 1 source packages (znuny), 7 status rows across 7 suites (focal, jammy, noble, oracular, plucky, questing, upstream): DNE 2, not-affected 2, ignored 1, needs-triage 1, released 1. https://ubuntu.com/security/CVE-2025-26842

Affected software / configurations for CVE-2025-26842

Vendor Product Version Raw CPE
znuny znuny <= 7.1.3 cpe:2.3:a:znuny:znuny:*:*:*:*:-:*:*:*

References for CVE-2025-26842

cvelogic Threat Intelligence