How severe is CVE-2021-33505?

CVE-2021-33505 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-33505 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33505?

CVE-2021-33505 affects Falco. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33505?

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-2021-33505 published?

CVE-2021-33505 was published on 2021-07-15 and last updated on 2026-06-17.

CVE-2021-33505

CVE-2021-33505 is a high-severity vulnerability in Falco with a CVSS 3.x base score of 7.8. 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 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Falco
Published: 2021-07-15
Last modified: 2026-06-17

Description

A local malicious user can circumvent the Falco detection engine through 0.28.1 by running a program that alters arguments of system calls being executed. Issue is fixed in Falco versions >= 0.29.1.

Frequently asked questions

What is CVE-2021-33505?: A local malicious user can circumvent the Falco detection engine through 0.28.1 by running a program that alters arguments of system calls being executed. Issue is fixed in Falco versions >= 0.29.1.
How severe is CVE-2021-33505?: CVE-2021-33505 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-33505 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33505?: CVE-2021-33505 affects Falco. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33505?: 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-2021-33505 published?: CVE-2021-33505 was published on 2021-07-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:falco:falco:*:*:*:*:*:*:*:*

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