PT-2021-15266 · Ubiquiti · Edgemax Edgerouter

Published 2021-05-20 · Updated 2025-07-20 · CVE-2021-22909

Positive Technologies (AI Summary)

CVSS v2.0

7.6

High

Base vector

AV:N/AC:H/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions EdgeMAX EdgeRouter versions prior to V2.0.9-hotfix.1

Description A vulnerability found in EdgeMAX EdgeRouter could allow a malicious actor to execute a man-in-the-middle (MitM) attack during a firmware update.

Recommendations For EdgeMAX EdgeRouter versions prior to V2.0.9-hotfix.1, update to EdgeMAX EdgeRouter V2.0.9-hotfix.1 or later to resolve the issue.

Fix

Improper Certificate Validation

Weakness Enumeration

CWE-300

CWE-295

Related Identifiers

CVE-2021-22909

ZDI-21-601

Affected Products

Edgemax Edgerouter

References · 8

• https://osv.dev/vulnerability/CVE-2021-22909 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-22909 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-601 · Security Note
• https://community.ui.com/releases/Security-Advisory-Bulletin-018-018/cfa1566b-4bf8-427b-8cc7-8cffba3a93a4 · Vendor Advisory
• https://t.me/cybersecuritytechnologies/3462 · Telegram Post
• https://t.me/cvenotify/15825 · Telegram Post
• https://twitter.com/AskPerplexity/status/1946900371344887894 · Twitter Post
• https://twitter.com/scp_localhost/status/1946900052112179590 · Twitter Post