How severe is CVE-2021-33356?

CVE-2021-33356 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-2021-33356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33356?

CVE-2021-33356 affects Raspap. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33356?

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-2021-33356 published?

CVE-2021-33356 was published on 2021-06-09 and last updated on 2026-06-17.

CVE-2021-33356

CVE-2021-33356 is a high-severity vulnerability in Raspap 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-269.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Raspap
Published: 2021-06-09
Last modified: 2026-06-17

Description

Multiple privilege escalation vulnerabilities in RaspAP 1.5 to 2.6.5 could allow an authenticated remote attacker to inject arbitrary commands to /installers/common.sh component that can result in remote command execution with root privileges.

Frequently asked questions

What is CVE-2021-33356?: Multiple privilege escalation vulnerabilities in RaspAP 1.5 to 2.6.5 could allow an authenticated remote attacker to inject arbitrary commands to /installers/common.sh component that can result in remote command execution with root privileges.
How severe is CVE-2021-33356?: CVE-2021-33356 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-2021-33356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33356?: CVE-2021-33356 affects Raspap. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33356?: 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-2021-33356 published?: CVE-2021-33356 was published on 2021-06-09 and last updated on 2026-06-17.

References

Affected products (1)

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

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