How severe is CVE-2021-22126?

CVE-2021-22126 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22126 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22126?

CVE-2021-22126 primarily affects Fortinet Fortiwlc. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22126?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2021-22126 have an EU (EUVD) identifier?

Yes. CVE-2021-22126 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-9282.

When was CVE-2021-22126 published?

CVE-2021-22126 was published on 2025-03-17 and last updated on 2026-06-17.

CVE-2021-22126

CVE-2021-22126 is a medium-severity vulnerability in Fortinet Fortiwlc with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-9282
Weakness: CWE-798
Affected product: Fortinet Fortiwlc
Published: 2025-03-17
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-22126?: CVE-2021-22126 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22126 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22126?: CVE-2021-22126 primarily affects Fortinet Fortiwlc. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22126?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-22126 have an EU (EUVD) identifier?: Yes. CVE-2021-22126 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-9282.
When was CVE-2021-22126 published?: CVE-2021-22126 was published on 2025-03-17 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-20-147

Affected products (5)

cpe:2.3:a:fortinet:fortiwlc:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiwlc:8.2.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiwlc:8.2.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiwlc:8.3.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiwlc:8.3.3:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortiwlc

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CVE-2021-26093 — High (CVSS 7.3): An access of uninitialized pointer (CWE-824) vulnerability in FortiWLC versions 8.6.0, 8.5.3 and earlier may allow a…

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