How severe is CVE-2021-26814?

CVE-2021-26814 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-26814 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26814?

CVE-2021-26814 affects Wazuh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26814?

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.

When was CVE-2021-26814 published?

CVE-2021-26814 was published on 2021-03-06 and last updated on 2026-06-17.

CVE-2021-26814

CVE-2021-26814 is a high-severity vulnerability in Wazuh with a CVSS 3.x base score of 8.8. 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Wazuh
Published: 2021-03-06
Last modified: 2026-06-17

Description

Wazuh API in Wazuh from 4.0.0 to 4.0.3 allows authenticated users to execute arbitrary code with administrative privileges via /manager/files URI. An authenticated user to the service may exploit incomplete input validation on the /manager/files API to inject arbitrary code within the API service script.

Frequently asked questions

What is CVE-2021-26814?: Wazuh API in Wazuh from 4.0.0 to 4.0.3 allows authenticated users to execute arbitrary code with administrative privileges via /manager/files URI. An authenticated user to the service may exploit incomplete input validation on the /manager/files API to inject arbitrary code within the API service script.
How severe is CVE-2021-26814?: CVE-2021-26814 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-26814 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26814?: CVE-2021-26814 affects Wazuh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26814?: 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.
When was CVE-2021-26814 published?: CVE-2021-26814 was published on 2021-03-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*

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