CVE-2021-22126

A use of hard-coded password vulnerability in FortiWLC version 8.5.2 and below, version 8.4.8 and below, version 8.3.3 to 8.3.2, version 8.2.7 to 8.2.6 may allow a local, authenticated attacker to connect to the managed Access Point (Meru AP and FortiAP-U) as root using the default hard-coded username and password.

Published: 2025-03-17 Last update: 2025-07-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-22126 is rated Low Risk (31.5/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.04%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-22126

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-29 0.05% 0.04% -0.01%
2 2026-04-25 0.02% 0.05% +0.04%
3 2025-04-29 — 0.02% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-22126

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.7 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.8 5.9 [email protected]

Weakness enumeration for CVE-2021-22126

Affected software / configurations for CVE-2021-22126

Vendor Product Version Raw CPE
fortinet fortiwlc >= 8.4.0, < 8.5.3 cpe:2.3:a:fortinet:fortiwlc:*:*:*:*:*:*:*:*
fortinet fortiwlc 8.2.6 cpe:2.3:a:fortinet:fortiwlc:8.2.6:*:*:*:*:*:*:*
fortinet fortiwlc 8.2.7 cpe:2.3:a:fortinet:fortiwlc:8.2.7:*:*:*:*:*:*:*
fortinet fortiwlc 8.3.2 cpe:2.3:a:fortinet:fortiwlc:8.3.2:*:*:*:*:*:*:*
fortinet fortiwlc 8.3.3 cpe:2.3:a:fortinet:fortiwlc:8.3.3:*:*:*:*:*:*:*

References for CVE-2021-22126

cvelogic Threat Intelligence