Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-73570

CVE-2026-73570HIGH

Zimbra Collaboration — A remote code execution vulnerability exists in Zimbra Collaboration (ZCS) before 10.1.20 when the optional zimbra-snmp package is instal…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   N  C  H  H  L    8.9   .1174   96.0   YES

AFFECTED
  Product        Versions     Fixed
  Collaboration  unspecified  —

TIMELINE
  Aug 12  Reserved by mitre
  Aug 13  Published (CNA: mitre)
  Aug 21  ADDED TO KEV — CVE-2026-73570 (Zimbra Collaboration). Remediation due August 24, 2026.
  Aug 25  DUE DATE PASSED — CVE-2026-73570 (Zimbra Collaboration). CISA remediation deadline was August 24, 2026; still in catalog.

CWE-78 · CNA: mitre · CVSS v3.1 · 4 references · NVD status: Analyzed · KEV due August 24, 2026

Description

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
August 12, 2026	Reserved	Reserved by mitre
August 13, 2026	Published	Published (CNA: mitre)
August 21, 2026	KEV ADDED	ADDED TO KEV — CVE-2026-73570 (Zimbra Collaboration). Remediation due August 24, 2026.
August 25, 2026	DUE DATE PASSED	DUE DATE PASSED — CVE-2026-73570 (Zimbra Collaboration). CISA remediation deadline was August 24, 2026; still in catalog.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Zimbra	Collaboration	—	—	—

Weaknesses

CWE-78

References (4)

https://moje.cert.pl/komunikaty/2026/145/aktywnie-wykorzystywana-podatnosc-w-zimbra-collaboration-suite/ [Third Party Advisory]
https://wiki.zimbra.com/wiki/Security_Center [Release Notes]
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories [Vendor Advisory]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-73570 [US Government Resource]

Authoritative record: CVE-2026-73570 at cve.org

Vendors: zimbra

Weaknesses: CWE-78

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-73570 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.