CVE-2026-86550Network attack vector

UXSS via unvalidated intent fallback redirects

Published Sep 8, 2026 · Updated Sep 8, 2026

UXSS in NuBrowser in ZTE Corporation NebulaOS before Browser 1.6.8 allows remote attackers to execute scripts via redirects. NuBrowser accepts a javascript scheme in the S.browser_fallback_url field of an intent URL reached through a 302 redirect instead of enforcing a protocol allowlist. A user must follow attacker-controlled navigation; the injected script runs in arbitrary website origins and can read data available to those origins.

CVSS severity6.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UXSS in NuBrowser in ZTE Corporation NebulaOS before Browser 1.6.8 allows remote attackers to execute scripts via redirects. NuBrowser accepts a javascript scheme in the S.browser_fallback_url field of an intent URL reached through a 302 redirect instead of enforcing a protocol allowlist. A user must follow attacker-controlled navigation; the injected script runs in arbitrary website origins and can read data available to those origins.

The record

CVE
CVE-2026-86550
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
ZTE Corporation
Product
NebulaOS
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Versions prior to Browser V1.6.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ZTE Corporation · NebulaOSversion=Versions prior to Browser V1.6.8

Published CVSS scores

6.5ZTE CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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