Cyber Resilience

CVE-2021-43327

MediumPublic PoC

Published: 02 December 2021

Published
02 December 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 4.6 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0014 33.6th percentile
Risk Priority 9 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-43327 is a medium-severity an unspecified weakness vulnerability in Renesas Rx65N Firmware. Its CVSS base score is 4.6 (Medium).

Operationally, ranked at the 33.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

An issue was discovered on Renesas RX65 and RX65N devices. With a VCC glitch, an attacker can extract the security ID key from the device. Then, the protected firmware can be extracted.

CWE(s)
NVD-CWE-noinfo

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

renesas
rx65n firmware
all versions
renesas
rx65 firmware
all versions

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References