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CVE-2021-33505

25
FAUCET Score

CVE-2021-33505 describes a high-severity vulnerability in Falco versions up to 0.28.1, allowing a local malicious user to bypass the detection engine. By altering system call arguments, an attacker can achieve high confidentiality, integrity, and availability impacts. While the CVSS score is 7.8, there is no evidence of active exploitation, public exploit code, or significant community discussion, suggesting a low current threat landscape. The issue is resolved in Falco versions 0.29.1 and later.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.28.1CPE matchmatch criteria
cpe:2.3:a:falco:falco:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 66th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / falcosecurity/falco/pull/1675
PatchThird Party Advisory
github.com / falcosecurity/falco/releases
Release NotesThird Party Advisory