What is CVE-2021-46145?

CVE-2021-46145 is a medium-severity vulnerability in Honda Civic 2012, classified under Authentication Bypass by Capture-replay. CVSS score: 5.3/10. Published 2022-01-06.

How severe is CVE-2021-46145?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Honda Civic 2012

CVE-2021-46145

The keyfob subsystem in Honda Civic 2012 vehicles allows a replay attack for unlocking. This is related to a non-expiring rolling code and counter resynchronization.

Published 2022-01-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.034 (88.7th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Honda Civic 2012

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

References

starvlab.qianxin.com/ (Third Party Advisory)
twitter.com/Kevin2600/status/1475482656871571459 (Third Party Advisory)
twitter.com/Kevin2600/status/1472070749208780804 (Third Party Advisory)
tiger-team-1337.blogspot.com/2022/01/honda-civic-keyfob-system-affected-by.html (Third Party Advisory)

Frequently asked questions

What is CVE-2021-46145?: CVE-2021-46145 is a medium-severity vulnerability in Honda Civic 2012, classified under Authentication Bypass by Capture-replay. CVSS score: 5.3/10. Published 2022-01-06.
How severe is CVE-2021-46145?: Medium severity. CVSS v3 base score is 5.3 out of 10.