CVE-2026-73572

MEDIUM

6.1

CVSS Score

Published: August 13, 2026 at 03:21 PM UTC

Updated: August 28, 2026 at 02:12 PM UTC

4 products affected across 2 vendorsCollaborationZimbra Collaboration SuiteCollaboration

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Severity

MEDIUM6.1

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

In Zimbra Collaboration (ZCS) before 10.1.17, a stored cross-site scripting (XSS) vulnerability exists in the Zimbra Classic Web Client due to insufficient sanitization of specific attachment content during inline preview. An attacker can send a crafted email containing a malicious attachment that, when previewed by a user, executes arbitrary JavaScript within the victim's browser session. Successful exploitation may allow an attacker to perform unauthorized actions on behalf of the victim user, potentially leading to data exfiltration or unauthorized access to sensitive information.

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 exploitNot automatablePartial impact

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

CVSS

6.1MEDIUMmitre

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

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