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TI-2021-04924 Aliases CVE-2021-21879GHSA-5g9q-q7rm-5vq9

Path traversal in Lantronix

Priority MEDIUM 45CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
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 File Upload functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially-crafted HTTP request can lead to arbitrary file overwrite. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Why it matters now

EPSS 0.03776 90th 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_2050:8.9.0.0:r4:*:*:*:*:*:*8.9.0.0 r4VulnerableLantronix
cpe:2.3:h:lantronix:premierwave_2050:-:*:*:*:*:*:*:*not specified by NVDRunning onLantronix
  • cpe:2.3:o:lantronix:premierwave_2050:8.9.0.0: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-2021-21879
  2. 2026-10-03 Alias added: GHSA-5g9q-q7rm-5vq9
  3. 2026-11-07 EPSS moved to the 90th–95th percentile

References

Exploit 1

Sources

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