CVE-2026-73573Network attack vectorHinoki check available

Authenticated file disclosure via packages path traversal

Published Aug 13, 2026 · Updated Aug 13, 2026

Path traversal in Zimbra Collaboration before 10.1.17 allows remote authenticated users to read files through the Briefcase editor. The editor's packages parameter accepts crafted ../ sequences without sufficient path validation, resolving requests outside the intended document path. A valid account is required, and disclosure is limited to sensitive files reachable within the web application directory.

CVSS severity3.1
Low
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in Zimbra Collaboration before 10.1.17 allows remote authenticated users to read files through the Briefcase editor. The editor's packages parameter accepts crafted ../ sequences without sufficient path validation, resolving requests outside the intended document path. A valid account is required, and disclosure is limited to sensitive files reachable within the web application directory.

The record

CVE
CVE-2026-73573
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Zimbra
Product
Zimbra Collaboration
Classifications
CWE-24, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <10.1.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zimbra · Zimbra Collaborationversion=0 <10.1.17

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-24Path Traversal: '../filedir'
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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