CVE Details
CVE-2026-73570
Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability
Published: 2026-08-21
CVSS: 8.9 HIGH
Product: Synacor Zimbra Collaboration Suite (ZCS)
Due Date: 2026-08-24
Zimbra Collaboration Suite (ZCS) contains an OS command injection vulnerability which could allow an unauthenticated attacker to send specially crafted SMTP requests that may result in execution of arbitrary operating system commands as the Zimbra user.
GitHub PoC
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FIRST EPSS
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Timeline
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Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-73570 |
| cveMetadata > | assignerOrgId | 8254265b-2729-46b6-b9e3-3dfca2d5bfca |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | mitre |
| cveMetadata > | dateReserved | 2026-08-12T21:44:20.945Z |
| cveMetadata > | datePublished | 2026-08-13T15:19:42.195Z |
| cveMetadata > | dateUpdated | 2026-08-21T17:27:32.267Z |
| containers > | cna > affected > 0 > defaultStatus | unaffected |
| containers > | cna > affected > 0 > product | Collaboration |
| containers > | cna > affected > 0 > vendor | Zimbra |
| containers > | cna > affected > 0 > versions > 0 > lessThan | 10.1.20 |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > affected > 0 > versions > 0 > version | 0 |
| containers > | cna > affected > 0 > versions > 0 > versionType | custom |
| containers > | cna > descriptions > 0 > lang | en |
| containers > | cna > descriptions > 0 > value | 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. |
| containers > | cna > metrics > 0 > cvssV3_1 > attackComplexity | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > attackVector | NETWORK |
| containers > | cna > metrics > 0 > cvssV3_1 > availabilityImpact | LOW |
| containers > | cna > metrics > 0 > cvssV3_1 > baseScore | 8.9 |
| containers > | cna > metrics > 0 > cvssV3_1 > baseSeverity | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > confidentialityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > integrityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > privilegesRequired | NONE |
| containers > | cna > metrics > 0 > cvssV3_1 > scope | CHANGED |
| containers > | cna > metrics > 0 > cvssV3_1 > userInteraction | NONE |
| containers > | cna > metrics > 0 > cvssV3_1 > vectorString | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L |
| containers > | cna > metrics > 0 > cvssV3_1 > version | 3.1 |
| containers > | cna > metrics > 0 > format | CVSS |
| containers > | cna > metrics > 0 > scenarios > 0 > lang | en |
| containers > | cna > metrics > 0 > scenarios > 0 > value | GENERAL |
| containers > | cna > problemTypes > 0 > descriptions > 0 > cweId | CWE-78 |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | cna > providerMetadata > orgId | 8254265b-2729-46b6-b9e3-3dfca2d5bfca |
| containers > | cna > providerMetadata > shortName | mitre |
| containers > | cna > providerMetadata > dateUpdated | 2026-08-13T15:19:42.195Z |
| containers > | cna > references > 0 > url | https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories |
| containers > | cna > references > 1 > url | https://wiki.zimbra.com/wiki/Security_Center |
| containers > | cna > x_generator > engine | CVE-Request-form 0.0.1 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > operator | OR |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > negate | False |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > criteria | cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > versionEndExcluding | 10.1.20 |
| containers > | adp > 0 > metrics > 0 > other > type | ssvc |
| containers > | adp > 0 > metrics > 0 > other > content > id | CVE-2026-73570 |
| containers > | adp > 0 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation | active |
| containers > | adp > 0 > metrics > 0 > other > content > options > 1 > Automatable | no |
| containers > | adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact | total |
| containers > | adp > 0 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 0 > metrics > 0 > other > content > timestamp | 2026-08-21T17:18:39.211103Z |
| containers > | adp > 0 > references > 0 > url | https://moje.cert.pl/komunikaty/2026/145/aktywnie-wykorzystywana-podatnosc-w-zimbra-collaboration-suite/ |
| containers > | adp > 0 > references > 0 > tags > 0 | third-party-advisory |
| containers > | adp > 0 > references > 1 > url | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-73570 |
| containers > | adp > 0 > references > 1 > tags > 0 | government-resource |
| containers > | adp > 0 > title | CISA ADP Vulnrichment |
| containers > | adp > 0 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 0 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2026-08-21T17:27:32.267Z |