CVE•Published 2026-08-13•Modified 2026-08-24•1 article on news•5 live references•NVD data
CVE-2026-73570Synacor · Zimbra_collaboration_suite
Vulnerability data via NVD (ingested)
CVSS v3.1
8.9
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
EPSS percentile
61
Exploit Prediction Scoring System · top 39% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2026-08-13
Modified 2026-08-24
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-73570Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Synacor Zimbra Collaboration Suite"All exposed Synacor Zimbra Collaboration Suite instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Zimbra Collaboration Suite"HTTP body or banner mentions "Zimbra Collaboration Suite" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-73570Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-73570Censys host search filtered to this CVE id.
grep.app
CVE-2026-73570Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-73570GitHub code search for direct mentions.
Google dork
"CVE-2026-73570" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (8)
CVE-2026-735708 repos
gabrielunknown/CVE-2026-73570Perl
Zimbra SNMP Notification OS Command Injection — Unauthenticated RCE via SMTP exploit (Poc)
HORKimhab/CVE-2026-73570Python
CVE-2026-73570
barmi/cve-patch-auditorGo
Audit CVE impact, patch status, remediation progress, and verification results across systems.
jishino567/CVE-2026-73570Python
PoC for CVE-2026-73570 (Zimbra SMTP Command Injection)
alsyundawy/eradicate-zimbra-malwareShell
Enterprise Forensic Incident Response, Anti-Ransomware, Polyglot Webshell Quarantine & Zimbra Permission Healing Suite
dahnutz/zimbra-cve-2026-73570-irShell
Detection-first, evidence-preserving incident-response toolkit for Zimbra CVE-2026-73570. Includes read-only host checks, IOC feeds, triage, persistence, containment, and recovery …
MangelZabalaDevelop/autonomous-research-labHTML
AI-native, human-governed vulnerability research on disclosed and vendor-remediated CVEs.
Accuracy132-Detect/Detection-Threat-Landscapeunknown
High-confidence detection engineering content derived from primary threat research. Includes production candidates and hunting queries for KQL, SPL, and YARA-L, with threat analysi…