How severe is CVE-2021-26093?

CVE-2021-26093 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2021-26093 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26093?

CVE-2021-26093 affects Fortinet Fortiwlc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26093?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2021-26093 have an EU (EUVD) identifier?

Yes. CVE-2021-26093 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-12914.

When was CVE-2021-26093 published?

CVE-2021-26093 was published on 2024-12-19 and last updated on 2026-06-17.

CVE-2021-26093

CVE-2021-26093 is a high-severity vulnerability in Fortinet Fortiwlc with a CVSS 3.x base score of 7.3. 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-824.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-12914
Weakness: CWE-824
Affected product: Fortinet Fortiwlc
Published: 2024-12-19
Last modified: 2026-06-17

Description

An access of uninitialized pointer (CWE-824) vulnerability in FortiWLC versions 8.6.0, 8.5.3 and earlier may allow a local and authenticated attacker to crash the access point being managed by the controller by executing a crafted CLI command.

Frequently asked questions

What is CVE-2021-26093?: An access of uninitialized pointer (CWE-824) vulnerability in FortiWLC versions 8.6.0, 8.5.3 and earlier may allow a local and authenticated attacker to crash the access point being managed by the controller by executing a crafted CLI command.
How severe is CVE-2021-26093?: CVE-2021-26093 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2021-26093 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26093?: CVE-2021-26093 affects Fortinet Fortiwlc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26093?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2021-26093 have an EU (EUVD) identifier?: Yes. CVE-2021-26093 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-12914.
When was CVE-2021-26093 published?: CVE-2021-26093 was published on 2024-12-19 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-21-002

Affected products (1)

cpe:2.3:a:fortinet:fortiwlc:*:*:*:*:*:*:*:*

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