Vulnerability Description
In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated using an insecure random number generator, resulting in insufficient entropy. An attacker who obtains a JWT signed with the generated secret may be able to recover the JWT signing secret through offline brute-force, potentially enabling JWT forgery.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Synacor | Zimbra Collaboration Suite | < 10.1.17 |
Related Weaknesses (CWE)
References
- https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_PolicyVendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
FAQ
What is CVE-2026-73576?
CVE-2026-73576 is a vulnerability with a CVSS score of 6.3 (MEDIUM). In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated using an insecure ra...
How severe is CVE-2026-73576?
CVE-2026-73576 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73576?
Check the references section above for vendor advisories and patch information. Affected products include: Synacor Zimbra Collaboration Suite.