CVE-2021-43327

MEDIUMNVD 4.64.6—

4.6

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.

CVSS v3: 4.6
EG Score: 4.6(medium)
EPSS: 33.5%
KEV: Not listed

Published

December 2, 2021

Last Modified

November 21, 2024

References (2)

cve@mitrehttps://www.collshade.fr/articles/reneshack/rx_glitch_article.html
af854a3a-2127-422b-91ae-364da2661108https://www.collshade.fr/articles/reneshack/rx_glitch_article.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-522Insufficiently Protected Credentials

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
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Frequently asked(5)

What is CVE-2021-43327?

CVE-2021-43327 is a medium vulnerability published on December 2, 2021. 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.

When was CVE-2021-43327 disclosed?

CVE-2021-43327 was first published in the National Vulnerability Database on December 2, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-43327 actively exploited?

CVE-2021-43327 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 33.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-43327?

CVE-2021-43327 has a CVSS v3 base score of 4.6 (NVD).

How do I remediate CVE-2021-43327?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-43327, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2021-43327

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-43327?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)