What is CVE-2021-38556?

CVE-2021-38556 is a high-severity vulnerability in Raspap, classified under Command Injection. CVSS score: 8.8/10. Published 2021-08-24.

How severe is CVE-2021-38556?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Raspap

CVE-2021-38556

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

Vulnerability class: Command Injection (OS Command Injection)

Published 2021-08-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.130 (96.2th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.130 · newest: 0.130 · change: 0.000

Affected products

Raspap — versions 2.6.6

Weakness classification (CWE)

CWE-77 — Command Injection

References

github.com/RaspAP/raspap-webgui (Product)
github.com/RaspAP/raspap-webgui/blob/0e1d652c5e55f812aaf2a5908884e9db179416ee/i… (Third Party Advisory)
zerosecuritypenetrationtesting.com/ (URL Repurposed, Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-38556?: CVE-2021-38556 is a high-severity vulnerability in Raspap, classified under Command Injection. CVSS score: 8.8/10. Published 2021-08-24.
How severe is CVE-2021-38556?: High severity. CVSS v3 base score is 8.8 out of 10.