CVE Catalog

CVE-2026-12339

MediumCVSS 6.9
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.53%

44th percentile - higher than 44% of all known CVEs

Summary

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system. Successful exploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability.

Risk Assessment

An attacker with administrator privileges can overwrite critical system files, potentially leading to system integrity compromise or unavailability.

Recommendation

Apply vendor patches. Restrict access to the WebUI ISP Upgrade functionality to trusted administrators and implement path validation in archives.

Related vulnerabilities

Original NVD description (English source)

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system.Successful exploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS