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Dossier · Vulnerability

Actively exploited · CISA KEV

CVE-2026-73570

  1. KEV
  2. 680 days →Disclosed
  3. 7 days →First PoC

Signals

Exploited in the wild
Yesadded 2026-08-21 · due 2026-08-24. An observation, not a forecast.
EPSS · 30-day forecast
72%Chance of exploitation in the next 30 days, 99th percentile of all CVEs. A forecast; KEV outranks it.
CVSS · NVD
not stated by sourcesNo NVD record yet.
Internet exposure
not stated by sourcesNo exposure census on this CVE's dispatches.

Exploits

10 known · links only

GitHub PoCs · by trust, then stars9

  1. HORKimhab/CVE-2026-73570 ↗Trust ok 100

    CVE-2026-73570

    ★ 5 · created 2026-08-21

  2. gabrielunknown/CVE-2026-73570 ↗Trust ok 100

    Zimbra SNMP Notification OS Command Injection — Unauthenticated RCE via SMTP exploit (Poc)

    ★ 4 · created 2026-08-26

  3. 0xBlackash/CVE-2026-73570 ↗Trust ok 100

    CVE-2026-73570

    ★ 2 · created 2026-09-30

  4. dahnutz/zimbra-cve-2026-73570-ir ↗Trust ok 100

    Detection-first, evidence-preserving incident-response toolkit for Zimbra CVE-2026-73570. Includes read-only host checks, IOC feeds, triage, persistence, containment, and recovery guidance based on sanitized incident evidence.

    ★ 2 · created 2026-09-04

  5. jishino567/CVE-2026-73570 ↗Trust ok 100

    PoC for CVE-2026-73570 (Zimbra SMTP Command Injection)

    ★ 2 · created 2026-08-25

  6. BiuTrap/CVE-2026-73570 ↗Trust ok 100

    CVE-2026-73570 PoC

    ★ 0 · created 2026-08-24

  7. hainhc/CVE-2026-73570 ↗Trust ok 100

    ★ 0 · created 2026-09-10

  8. INFOKOM-KI/Zimbra-CVE-2026-73570-Rules ↗Trust ok 100

    Wazuh Rules for Detection Zimbra (CVE-2026-73570).

    ★ 0 · created 2026-08-28

  9. juanpoch/CVE-2026-73570 ↗Trust ok 100

    Zimbra Collaboration Suite RCE — SMTP log poisoning → swatchdog → OS Command Injection (CVSS 8.9, CISA KEV)

    ★ 0 · created 2026-09-05

Fake proof-of-concept repositories have been used to deliver malware to the researchers who run them. The trust verdict is our engine's heuristic over the repository (account age, what it ships, how its stars arrived); it is a reason to read the code first, not a finding about its author.

Nuclei1

  1. Zimbra Collaboration Suite < 10.1.20 - OS Command Injection ↗

    Zimbra Collaboration Suite (ZCS) before version 10.1.20 is vulnerable to OS command injection in the SNMP notification processing due to improper input sanitization. According to the NVD, when SNMP notifications are enabled and the zimbra-snmp package is installed, an unauthenticated attacker can inject arbitrary commands using crafted SMTP requests that result in malicious log entries. The swatchdog service monitors the log, and upon matching a pattern, passes the log content to zmsnmptrapd, wh

    yaml · seen 2026-10-18

On the wire

2 dispatches
  1. When Business Email Compromise Starts Rewriting RealityKEV
  2. [KEV] CVE-2026-73570: Zimbra Collaboration Suite (ZCS) OS Command Injection VulnerabilityKEV

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