CVE-2026-73576

Summary

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.

Affected Software

VendorProductVersion RangeStatus
ZimbraCollaboration0 < 10.1.17affected

Weaknesses

  • CWE-1241: CWE-1241 Use of Predictable Algorithm in Random Number Generator

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References