---
title: "CVE-2026-93641: Zimbra Classic - Stored XSS"
description: "Zimbra Classic contains a stored XSS caused by unauthenticated sender forging share notification, letting attackers access mailbox data and act as victim when signed-in user clicks Accept Share."
url: https://panop.io/threat-heartbeat/CVE-2026-93641/
---

# CVE-2026-93641 Zimbra Classic - Stored XSS

Zimbra Classic contains a stored XSS caused by unauthenticated sender forging share notification, letting attackers access mailbox data and act as victim when signed-in user clicks Accept Share.

CVSS base score 9.3 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.27% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93641)

## Details

Type

Stored XSS

Impact

Stored XSS, Information Disclosure

CVSS vector

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

Published

25 September 2026

Updated

15 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to the latest version with XSS fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-93641](https://nvd.nist.gov/vuln/detail/CVE-2026-93641)
- [https://wiki.zimbra.com/wiki/Zimbra\_Security\_Advisories](https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)