How to Fix CVE-2026-40552: mpGabinet (Bundle Sibling)
By Sai Kiran Pandrala
Last verified: 2026-05-25
CVE-2026-40552 is a sibling vulnerability in the same vendor advisory as CVE-2026-40550. Applying the patched build named in the primary write-up closes this CVE as well.
| Severity | CVSS 4.7 - Medium |
|---|---|
| Actively exploited? | Not currently in CISA KEV |
| Affected | Same as the bundle - see CVE-2026-40550 |
| Fixed in | Same patched build as CVE-2026-40550 (See vendor advisory) |
| Type (CWE) | CWE-669: CWE-669: Incorrect Resource Transfer Between Spheres |
What's different about CVE-2026-40552?
mpGabinet is vulnerable to Remote Command Execution. An authorized user with access to the application and direct access to the backend database can achieve system command execution by uploading an attachment and modifying its storage path in the database to reference an attacker-controlled remote network resource. Alternatively, it is possible to use a previously uploaded file and change its reference. When the application processes the attachment, and a user tries to open it, the referenced resource is executed by the system.
The technical impact and remediation are identical to the primary CVE in the bundle. The same vendor patch closes both.
How to fix CVE-2026-40552
Apply the patched build per the primary write-up: How to Fix CVE-2026-40550.
The patch installation procedure, verification commands, and interim mitigations are documented there. Reusing one runbook keeps the rollout consistent across the bundle.
Frequently asked questions
Is CVE-2026-40552 fixed by the same patch as CVE-2026-40550?
Yes. CVE-2026-40552 ships in the same vendor advisory as CVE-2026-40550. Applying the patched build named in the primary write-up closes both.
What is the CVSS score for CVE-2026-40552?
The CVSS base score is 4.7 (Medium).
Is it being exploited?
It is not currently listed in CISA KEV.
References
- Official vendor advisory: https://cert.pl/posts/2026/04/CVE-2026-40550/
- NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-40552
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary write-up: How to Fix CVE-2026-40550
*Part of the mpGabinet bundle. Full procedure at CVE-2026-40550.*