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CVE-2026-73574

MEDIUM
6.5
CVSS Score
Published: August 13, 2026 at 03:23 PM UTC
Updated: August 28, 2026 at 02:02 PM UTC
4 products affected across 2 vendorsCollaborationZimbra Collaboration SuiteCollaboration

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

In Zimbra Collaboration before 10.1.17, a local file inclusion (LFI) vulnerability exists in the Zimbra Classic Web Client due to improper validation of the fu request parameter. An unauthenticated attacker can exploit this vulnerability by supplying a crafted path, potentially allowing unauthorized disclosure of protected files, such as WEB-INF/web.xml, within the web application directory. This occurs in the Forward servlet.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Zimbra Collaboration Suite· Synacor
95%
v < 10.1.17
Affected range stops below 10.1.17, so it looks safe — our inference, not a vendor statement
Collaboration· Zimbra
95%
v < 10.1.17
Affected range stops below 10.1.17, so it looks safe — our inference, not a vendor statement
Collaboration· Synacor
75%
v < 10.1.17
Affected range stops below 10.1.17, so it looks safe — our inference, not a vendor statement
Zimbra Collaboration Suite· Zimbra
60%
v < 10.1.17
Affected range stops below 10.1.17, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
Vendor Advisory
Source: cverecord
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-669

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