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TI-2021-04806 Aliases CVE-2021-21739GHSA-2r85-x553-vqw2

Insufficient verification of data authenticity in <ZXCTN 6120H>

Priority LOW 21CWE-345Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-345.

Summary

A ZTE's product of the transport network access layer has a security vulnerability. Because the system does not sufficiently verify the data reliability, attackers could replace an authenticated optical module on the equipment with an unauthenticated one, bypassing system authentication and detection, thus affecting signal transmission. This affects: <ZXCTN 6120H><V5.10.00B24>

Why it matters now

EPSS 0.00248 16th 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
—<ZXCTN 6120H><V5.10.00B24>—No fix listedCNA
  • <ZXCTN 6120H> Vendor— Affected <V5.10.00B24> Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:zte:zxctn_6120h_firmware:5.10.00b24:*:*:*:*:*:*:*5.10.00b24VulnerableZTE
cpe:2.3:h:zte:zxctn_6120h:-:*:*:*:*:*:*:*not specified by NVDRunning onZTE
  • cpe:2.3:o:zte:zxctn_6120h_firmware:5.10.00b24:*:*:*:*:*:*:* Versions 5.10.00b24 Vulnerable ·ZTE
  • cpe:2.3:h:zte:zxctn_6120h:-:*:*:*:*:*:*:* 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-2021-21739
  2. 2026-10-03 Alias added: GHSA-2r85-x553-vqw2

References

Advisory 1

Sources

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