What’s Vulnerable › Vulnerabilities

CVE-2019-6980

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-05-29 · updated 2026-06-17
• Weakness: CWE-502

Description

Synacor Zimbra Collaboration Suite 8.7.x through 8.8.11 allows insecure object deserialization in the IMAP component.

Affected products

• Zimbra Collaboration: from 8.7.0 before 8.7.11; from 8.8.0 before 8.8.9; 8.7.11, 8.7.11-p1, 8.7.11-p2, 8.7.11-p3, 8.7.11-p4, 8.7.11-p5 (+18) — fixed in 8.7.11, 8.8.9

How to fix

Upgrade to a fixed version: Zimbra Collaboration 8.7.11, 8.8.9. Check the vendor advisory for mitigations.

References

• https://bugzilla.zimbra.com/show_bug.cgi?id=109097
• https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
• https://bugzilla.zimbra.com/show_bug.cgi?id=109097
• https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

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