How severe is CVE-2021-38556?

CVE-2021-38556 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-2021-38556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38556?

CVE-2021-38556 affects Raspap. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38556?

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-2021-38556 published?

CVE-2021-38556 was published on 2021-08-24 and last updated on 2026-06-17.

CVE-2021-38556

CVE-2021-38556 is a high-severity vulnerability in Raspap with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-77.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Raspap
Published: 2021-08-24
Last modified: 2026-06-17

Description

includes/configure_client.php in RaspAP 2.6.6 allows attackers to execute commands via command injection.

Frequently asked questions

What is CVE-2021-38556?: includes/configure_client.php in RaspAP 2.6.6 allows attackers to execute commands via command injection.
How severe is CVE-2021-38556?: CVE-2021-38556 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-2021-38556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38556?: CVE-2021-38556 affects Raspap. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38556?: 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-2021-38556 published?: CVE-2021-38556 was published on 2021-08-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:raspap:raspap:2.6.6:*:*:*:*:*:*:*

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