CVE-2026-73570

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.

CVSS v3.1

8.9 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L

EPSS

20.53% chance of exploitation in the next 30 days, 97th percentile

CISA KEV

added 2026-08-21

Nuclei

high · CWE-78

Published

2026-08-13

Updated

2026-08-24

Proof-of-concept exploits (6)

• HORKimhab/CVE-2026-735705★ · 2026-08-25
• gabrielunknown/CVE-2026-735704★ · 2026-08-28
• jishino567/CVE-2026-735702★ · 2026-08-25
• BiuTrap/CVE-2026-735700★ · 2026-08-25
• alsyundawy/eradicate-zimbra-malware1★ · 2026-08-30
• virologi-info/Zimbra-security0★ · 2026-08-29

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/network/cves/2026/CVE-2026-73570.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2026-59310
• CVE-2026-64849
• CVE-2025-27915
• CVE-2025-49844
• CVE-2026-73568
• CVE-2026-73633