CVE-2026-73576

Published Aug 13, 2026

Last updated 20 days ago

Overview

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.
Source
cve@mitre.org
NVD status
Analyzed
Products
zimbra_collaboration_suite

Risk scores

CVSS 3.1

Type
Primary
Base score
6.5
Impact score
3.6
Exploitability score
2.8
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Severity
MEDIUM

Weaknesses

cve@mitre.org
CWE-1241

Social media

Hype score
Not currently trending

Configurations