Cross-Site Scripting (XSS) in WebUI (CVE-2026-44387)
Summary
Cross-site scripting in WebUI (CVE-2026-44387). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
ELECOM wireless LAN routers and access points devices contain a reflected cross-site scripting vulnerability in WebUI. If this vulnerability is exploited, an arbitrary script may be executed on a logged-in user's web browser.
Source: JVN (Japan Vulnerability Notes) 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-2026-44387 has been found in WebUI.
Risk of unauthorized operations or information disclosure. CVSS score: 5.2/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "WebUI CVE-2026-44387" on the vendor's site.
CVE-2026-44387 (WebUI) — CWE-79 / CVSS v3 5.2
Attack vector: adjacent-network / unauthenticated
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.
Cross-site scripting (XSS) (CWE-79) exists in WebUI.
Check the vendor advisory for the affected versions of WebUI.
Severity: Medium (CVSS 5.2/10). 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. Run grep -r 'WebUI' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'WebUI' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
WebUIを grep し、稼働しているサービス・バージョンを把握する。 -
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
- JVN JVNDB-2026-000103
- web nvd.nist.gov
- web jvn.jp
- web elecom.co.jp
- web github.com
- web vultures@jpcert.or.jp
- web vultures@jpcert.or.jp