CVE-2021-33505
Falco through 0.28.1 has a Time-of-check Time-of-use (TOCTOU) Race Condition. Issue is fixed in...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-33505- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 4.6 Medium
AV:L/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-269
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-33505- Updated
- 2026-11-02
EUVDEUVD-2021-20204 No score
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.
- Record
EUVD-2021-20204- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fj3r-qw82-xcxx No score
Falco through 0.28.1 has a Time-of-check Time-of-use (TOCTOU) Race Condition. Issue is fixed in...
Falco through 0.28.1 has a Time-of-check Time-of-use (TOCTOU) Race Condition. Issue is fixed in Falco versions >= 0.29.1.
- Record
GHSA-fj3r-qw82-xcxx- Weakness
- CWE-269
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-33505- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-33505 is a high vulnerability (CVSS 7.8) in Falco, published July 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 28th percentile. No source names a fixed version.