CVE-2026-12339
A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences.
Overview
CVE-2026-12339 is a known-severity vulnerability. It was published on August 10, 2026.
Technical description
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.
Remediation
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
References
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Frequently asked questions
What is CVE-2026-12339?
CVE-2026-12339 is a known-severity vulnerability. It was published on August 10, 2026.
How severe is CVE-2026-12339?
CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.
How do I fix or remediate CVE-2026-12339?
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-12339?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-12339 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.