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TI-2026-51660 Aliases CVE-2026-73570GHSA-jqh7-pchh-v74j

OS command injection in Zimbra Collaboration

Priority CRITICAL 98Exploited in the wildCWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

A remote code execution vulnerability exists in Zimbra Collaboration (ZCS) before 10.1.20 when the optional zimbra-snmp package is installed and SNMP notifications are enabled. Due to improper sanitization of untrusted input during SNMP notification processing, an unauthenticated attacker can send specially crafted SMTP requests that may result in execution of arbitrary operating system commands as the Zimbra user.

Why it matters now

Exploitation Active In CISA KEV since 2026-08-21CISA due date 2026-08-24
EPSS 0.71663 99th percentileScored 2026-11-07
Fix Fixed Collaboration (Zimbra): 10.1.20

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZimbraCollaborationbefore 10.1.2010.1.20Patch availableCNA
  • Collaboration VendorZimbra Affected before 10.1.20 Fixed in 10.1.20 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*before 10.1.20VulnerableSynacor
  • cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:* Versions before 10.1.20 Vulnerable ·Synacor

Remediation

  • Fix · CNA Collaboration (Zimbra) Fixed in 10.1.20

Timeline

  1. 2026-08-21 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2026-73570
  3. 2026-10-03 Alias added: GHSA-jqh7-pchh-v74j
  4. 2026-10-06 EPSS moved to the 99th percentile and above

References

Advisory 2

Other 1

  • TI-2025-40820 Cross-site scripting in Zimbra Collaboration KEVCVSS 3.1HIGH 7.2
  • TI-2024-18266 An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. KEVCVSS 3.1MEDIUM 6.1
  • TI-2024-30553 An issue was discovered in Zimbra Collaboration (ZCS) 10.1.x before 10.1.1, 10.0.x before… CVSS 3.1HIGH 8.8
  • TI-2022-13998 Zimbra Collaboration Open Source 8.8.15 does not encrypt the initial-login randomly… CVSS 3.1CRITICAL 9.8
  • TI-2026-63080 Path traversal in Zimbra Collaboration Suite CVSS 3.1CRITICAL 9.8
  • TI-2023-13772 An issue in Zimbra Collaboration ZCS v.8.8.15 and v.9.0 allows an attacker to execute… CVSS 3.1CRITICAL 9.8
See all 94 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences