What is CVE-2026-86550?

CVE-2026-86550 is a medium-severity vulnerability in ZTE Nebulaos, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-09-08.

How severe is CVE-2026-86550?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XSS in ZTE Nebulaos

CVE-2026-86550

NuBrowser lacks protocol whitelist validation for the S.browser_fallback_url field of intent://, allowing attackers to inject javascript: URLs via 302 redirects. This results in a universal cross‑site scripting (UXSS) vulnerability that enables script execution within the origin of arbitrary websites.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Zte Nebulaos — versions Versions prior to Browser V1.6.8

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

psirt@zte.com.cn

Frequently asked questions

What is CVE-2026-86550?: CVE-2026-86550 is a medium-severity vulnerability in ZTE Nebulaos, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-09-08.
How severe is CVE-2026-86550?: Medium severity. CVSS v3 base score is 6.5 out of 10.