CVE-2026-105624
Zenitel Connect login allows account-lockout denial of service
The login flow in Zenitel Connect before 1.11.0 applies per-account lockout on repeated failed login attempts, which allows remote attackers to cause a denial of service (temporary lockout of targeted user accounts from the web interface, repeatable for as long as the attack continues) via repeated failed login requests for a known or guessed username. Intercom call handling is not affected.
Fixes and workarounds
Fix
Upgrade to version 1.11.0
Source: CNA: ZenitelAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Zenitel Connect Zenitel |
≥ 0; < 1.11.0 (affected, semver)
Other versions: unaffected |
CNA: Zenitel |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.9 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | CNA: Zenitel |
| 4.0 / 6.9 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: cf9c5165-6fe5-4ec0-b5f1-404f1df30a4e |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.zenitel.com/sites/default/files/2026-11/A100K12404-Zenitel-Security-Advisory.pdfCNA: Zenitel
- https://www.zenitel.com/sites/default/files/2026-11/A100K12404-Zenitel-Security-Advisory.pdfcf9c5165-6fe5-4ec0-b5f1-404f1df30a4e
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