CVE-2026-28721 Path traversal in Acronis Cyber Protect 17

What is CVE-2026-28721?

CVE-2026-28721 is a high-severity path traversal vulnerability in Acronis Cyber Protect, published on 5 Mar 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Local privilege escalation due to improper soft link handling. The following products are affected: Acronis Cyber Protect 17 (Windows) before build 41186.

Weakness: CWE-610

Which versions are affected by CVE-2026-28721?

It affects 1 product.

Products include Acronis Cyber Protect.

How do I fix CVE-2026-28721?

No fix has been published for CVE-2026-28721 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-2026-28721 being exploited?

There is no known exploitation of CVE-2026-28721 in the wild and no public exploit code.

Other vulnerabilities in Acronis Cyber Protect

• CVE-2025-30411 Auth bypass in Acronis Cyber Protect 15 Critical 10.0
• CVE-2025-30412 Auth bypass in Acronis Cyber Protect 15 Critical 10.0
• CVE-2025-30416 Missing authorization in Acronis Cyber Protect 15 Critical 10.0
• CVE-2026-28710 Auth bypass in Acronis Cyber Protect 17 High 8.1
• CVE-2021-44198 DLL hijacking could lead to local privilege escalation High 7.8

All Acronis Cyber Protect vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-3x6x-hp89-vcmq.