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TI-2021-21211 Aliases CVE-2021-46387GHSA-f4h9-4w7g-w29c

ZyXEL ZyWALL 2 Plus Internet Security Appliance is affected by Cross Site Scripting (XSS).

Priority MEDIUM 46CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

ZyXEL ZyWALL 2 Plus Internet Security Appliance is affected by Cross Site Scripting (XSS). Insecure URI handling leads to bypass security restriction to achieve Cross Site Scripting, which allows an attacker able to execute arbitrary JavaScript codes to perform multiple attacks such as clipboard hijacking and session hijacking.

Why it matters now

EPSS 0.20955 97th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:zyxel:zywall_2_plus_internet_security_appliance_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableZyxel
cpe:2.3:h:zyxel:zywall_2_plus_internet_security_appliance:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
  • cpe:2.3:o:zyxel:zywall_2_plus_internet_security_appliance_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:zywall_2_plus_internet_security_appliance:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-46387
  2. 2026-10-03 Alias added: GHSA-f4h9-4w7g-w29c

References

Exploit 2

Advisory 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences