Path Traversal in WebUI ISP Upgrade functionality (CVE-2026-12339)
Summary
Path traversal in WebUI ISP Upgrade functionality (CVE-2026-12339). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the 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 overwrite on the underlying system, affecting system integrity and availability.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-12339 has been found in WebUI ISP Upgrade functionality.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "WebUI ISP Upgrade functionality CVE-2026-12339" on the vendor's site.
CVE-2026-12339 (WebUI ISP Upgrade functionality) — CWE-22
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Path traversal (CWE-22) exists in WebUI ISP Upgrade functionality.
Check the vendor advisory for the affected versions of WebUI ISP Upgrade functionality.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで WebUI ISP Upgrade functionality を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web tp-link.com
- web tp-link.com
- web tp-link.com
- web tp-link.com
- web nvd.nist.gov
- web tp-link.com
- web github.com
- web tp-link.com
- web tp-link.com
- web tp-link.com
- web tp-link.com