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TI-2021-04794 Aliases CVE-2021-21727GHSA-8q85-4h38-w789

A ZTE product has a DoS vulnerability.

Priority LOW 36Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A ZTE product has a DoS vulnerability. A remote attacker can amplify traffic by sending carefully constructed IPv6 packets to the affected devices, which eventually leads to device denial of service. This affects:<ZXHN F623><All versions up to V6.0.0P3T33>

Why it matters now

EPSS 0.01437 73rd percentileScored 2026-11-07
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
—<ZXHN F623><ZXHN Z500 V1.0.0.2B1.1000 & ZXHN F670L V1.1.10P1N2E>—No fix listedCNA
  • <ZXHN F623> Vendor— Affected <ZXHN Z500 V1.0.0.2B1.1000 & ZXHN F670L V1.1.10P1N2E> Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:zte:zxhn_f623_firmware:*:*:*:*:*:*:*:*before 6.0.0p3t34VulnerableZTE
cpe:2.3:h:zte:zxhn_f623:-:*:*:*:*:*:*:*not specified by NVDRunning onZTE
  • cpe:2.3:o:zte:zxhn_f623_firmware:*:*:*:*:*:*:*:* Versions before 6.0.0p3t34 Vulnerable ·ZTE
  • cpe:2.3:h:zte:zxhn_f623:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·ZTE

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21727
  2. 2026-10-03 Alias added: GHSA-8q85-4h38-w789

References

Advisory 1

Sources

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