CVE-2026-73574 Path traversal in Collaboration
Unauthenticated attackers can read protected files via path traversal in the Zimbra Classic Web Client Forward servlet.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73574?
CVE-2026-73574 is a low-severity path traversal vulnerability in Synacor Zimbra Collaboration Suite, published on 13 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-669
Which versions are affected by CVE-2026-73574?
It affects 1 product.
Products include Synacor Zimbra Collaboration Suite.
How do I fix CVE-2026-73574?
No fix has been published for CVE-2026-73574 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-73574 being exploited?
There is no known exploitation of CVE-2026-73574 in the wild and no public exploit code.
Other vulnerabilities in Synacor Zimbra Collaboration Suite
- CVE-2024-45519 Synacor Zimbra Collaboration Suite (ZCS) Command Execution
- CVE-2022-41352 Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload
- CVE-2022-37042 Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass
- CVE-2022-27924 Synacor Zimbra Collaboration Suite (ZCS) Command Injection
- CVE-2020-7796 Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery
Sources
Also known as GHSA-79qx-wf73-69v4.