CVE-2026-77506
Medium
Description
Znuny before LTS 6.5.22 allows AgentTicketEmailResend template XSS.
SeverityMedium
CVSS4.8
Exploit probability—
ProductZnuny
PublishedAug 20, 2026
First seenAug 20, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- Znuny Znuny6.5.22 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Znuny Znuny | 6.0 ≤ v < 6.5.22 | 6.5.22 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.