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TI-2021-05770 Aliases CVE-2021-22909GHSA-rcxg-wqw2-89wf

Improper certificate validation in EdgeMAX EdgeRouter

Priority LOW 35CWE-300Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.

Summary

A vulnerability found in EdgeMAX EdgeRouter V2.0.9 and earlier could allow a malicious actor to execute a man-in-the-middle (MitM) attack during a firmware update. This vulnerability is fixed in EdgeMAX EdgeRouter V2.0.9-hotfix.1 and later.

Why it matters now

EPSS 0.01292 70th 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
—EdgeMAX EdgeRouterFixed Version: 2.0.9-hotfix.1 or later.—No fix listedCNA
  • EdgeMAX EdgeRouter Vendor— Affected Fixed Version: 2.0.9-hotfix.1 or later. Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:ui:edgemax_edgerouter_firmware:*:*:*:*:*:*:*:*up to 2.0.9VulnerableUbiquiti
cpe:2.3:h:ui:edgemax_edgerouter:-:*:*:*:*:*:*:*not specified by NVDRunning onUbiquiti
  • cpe:2.3:o:ui:edgemax_edgerouter_firmware:*:*:*:*:*:*:*:* Versions up to 2.0.9 Vulnerable ·Ubiquiti
  • cpe:2.3:h:ui:edgemax_edgerouter:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Ubiquiti

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-22909
  2. 2026-10-03 Alias added: GHSA-rcxg-wqw2-89wf

References

Advisory 1

  • TI-2023-02228 Ubiquiti EdgeRouter X Web Management command injection CVSS 4.0HIGH 8.6
  • TI-2022-21333 A remote code execution vulnerability in EdgeRouters (Version 2.0.9-hotfix.4 and earlier)… CVSS 3.1HIGH 8.8
  • TI-2023-15306 Buffer overflow in Ubiquiti EdgeRouter CVSS 3.1HIGH 7.5

Sources

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