CVE-2023-33220
CWE-121Published: December 15, 2023· Updated: Jun 17, 2026
Official Description
During the retrofit validation process, the firmware doesn't properly check the boundaries while copying some attributes
to check. This allows a stack-based buffer overflow that could lead to a potential Remote Code Execution on the targeted
device
Risk Analysis
Idemia Sigma firmware contains a stack-based buffer overflow during the retrofit validation process. This critical vulnerability could allow an attacker to execute arbitrary code on the device.
No public exploit is known, and it is not in the KEV catalog. The vulnerability is remotely exploitable with low complexity.
Apply the latest firmware updates provided by Idemia. Ensure that the device is not exposed to untrusted networks.
Technical Analysis
CVE-2023-33220 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-121)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-33220 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts