Medium severity6.2NVD Advisory· Published Mar 4, 2022· Updated Jun 17, 2026
CVE-2021-43393
CVE-2021-43393
Description
STMicroelectronics STSAFE-J 1.1.4, J-SAFE3 1.2.5, and J-SIGN sometimes allow attackers to abuse signature verification. This is associated with the ECDSA signature algorithm on the Java Card J-SAFE3 and STSAFE-J platforms exposing a 3.0.4 Java Card API. It is exploitable for STSAFE-J in closed configuration and J-SIGN (when signature verification is activated) but not for J-SAFE3 EPASS BAC and EAC products. It might also impact other products based on the J-SAFE-3 Java Card platform.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
4- cpe:2.3:o:st:j-safe3_firmware:1.2.5:*:*:*:*:*:*:*
- cpe:2.3:o:st:stsafe-j_firmware:1.1.4:*:*:*:*:*:*:*
- Range: <1.1.4
- Range: <1.2.5
Patches
Vulnerability mechanics
References
2- community.st.com/s/toparticlesnvdVendor Advisory
- www.cert.ssi.gouv.fr/avis/CERTFR-2022-AVI-169/nvdThird Party Advisory
News mentions
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