Vulnerability-Lookup

CERTFR-2026-AVI-1041

Vulnerability from certfr_avis - Published: 2026-08-19 - Updated: 2026-08-19

De multiples vulnérabilités ont été découvertes dans Synacor Zimbra Collaboration. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une falsification de requêtes côté serveur (SSRF) et une injection de code indirecte à distance (XSS).

L'ENISA indique que la vulnérabilité CVE-2026-73570 est activement exploitée.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

	Vendor	Product	Description
	Synacor	Zimbra Collaboration	Zimbra Collaboration versions antérieures à 10.1.20

References

Title

Publication Time

Tags

Bulletin de sécurité Zimbra	2026-08-13	vendor-advisory
ENISA EUVD	-	other

Show details on source website

JSON

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{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Zimbra Collaboration versions ant\u00e9rieures \u00e0 10.1.20",
      "product": {
        "name": "Zimbra Collaboration",
        "vendor": {
          "name": "Synacor",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2026-50055",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-50055"
    },
    {
      "name": "CVE-2026-73570",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-73570"
    },
    {
      "name": "CVE-2026-10631",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-10631"
    },
    {
      "name": "CVE-2026-50054",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-50054"
    }
  ],
  "initial_release_date": "2026-08-19T00:00:00",
  "last_revision_date": "2026-08-19T00:00:00",
  "links": [
    {
      "title": "ENISA EUVD",
      "url": "https://euvd.enisa.europa.eu/vulnerability/CVE-2026-73570"
    }
  ],
  "reference": "CERTFR-2026-AVI-1041",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-08-19T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Injection de code indirecte \u00e0 distance (XSS)"
    },
    {
      "description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
    },
    {
      "description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
    },
    {
      "description": "Falsification de requ\u00eates c\u00f4t\u00e9 serveur (SSRF)"
    },
    {
      "description": "Contournement de la politique de s\u00e9curit\u00e9"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Synacor Zimbra Collaboration. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une ex\u00e9cution de code arbitraire \u00e0 distance, une falsification de requ\u00eates c\u00f4t\u00e9 serveur (SSRF) et une injection de code indirecte \u00e0 distance (XSS).\n\nL\u0027ENISA indique que la vuln\u00e9rabilit\u00e9 CVE-2026-73570 est activement exploit\u00e9e.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans Synacor Zimbra Collaboration",
  "vendor_advisories": [
    {
      "published_at": "2026-08-13",
      "title": "Bulletin de s\u00e9curit\u00e9 Zimbra",
      "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"
    }
  ]
}

CVE-2026-73570 (GCVE-0-2026-73570)

Vulnerability from cvelistv5 – Published: 2026-08-13 15:19 – Updated: 2026-08-24 12:17

Summary

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.

Severity

8.9 (High)


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

SSVC

Exploitation: active Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-22 03:55 UTC

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

mitre mitre root

References

4 references

URL	Tags
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
https://wiki.zimbra.com/wiki/Security_Center
https://moje.cert.pl/komunikaty/2026/145/aktywnie…	third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version
Zimbra	Collaboration	Affected: 0 , < 10.1.20 (custom) cpe:2.3:a:zimbra:collaboration::::::::

Show details on NVD website

JSON

To clipboard

{
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        "metrics": [
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                "id": "CVE-2026-73570",
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      "metrics": [
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          "cvssV3_1": {
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            "confidentialityImpact": "HIGH",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.