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TI-2021-04940 Aliases CVE-2021-21895GHSA-pgf6-x544-v9h8

Path traversal in Lantronix

Priority LOW 36CWE-22Published · Updated

Key facts

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

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

Summary

A directory traversal vulnerability exists in the Web Manager FsTFtp functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to FsTFtp file overwrite. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Why it matters now

EPSS 0.02415 84th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged 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
—LantronixLantronix PremierWave 2050 8.9.0.0R4 (in QEMU)—No fix listedCNA
  • Lantronix Vendor— Affected Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU) Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:lantronix:premierwave_2050_firmware:8.9.0.0:r4:*:*:*:*:*:*8.9.0.0 r4VulnerableLantronix
cpe:2.3:h:lantronix:premierwave_2050:-:*:*:*:*:*:*:*not specified by NVDRunning onLantronix
  • cpe:2.3:o:lantronix:premierwave_2050_firmware:8.9.0.0:r4:*:*:*:*:*:* Versions 8.9.0.0 r4 Vulnerable ·Lantronix
  • cpe:2.3:h:lantronix:premierwave_2050:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Lantronix

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21895
  2. 2026-10-03 Alias added: GHSA-pgf6-x544-v9h8

References

Exploit 1

  • TI-2021-04926 OS command injection in Lantronix CVSS 3.1CRITICAL 9.9
  • TI-2021-04937 Stack-based buffer overflow in Lantronix CVSS 3.1CRITICAL 9.9
  • TI-2021-04928 OS command injection in Lantronix CVSS 3.1CRITICAL 9.9
  • TI-2021-04917 OS command injection in Lantronix CVSS 3.1CRITICAL 9.9
  • TI-2021-04934 Stack-based buffer overflow in Lantronix CVSS 3.1CRITICAL 9.9
  • TI-2021-04929 OS command injection in Lantronix CVSS 3.1CRITICAL 9.1
See all 22 →

Sources

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