What is CVE-2021-20738?

CVE-2021-20738 is a medium-severity vulnerability in Elecom Wrc-1167fsa. CVSS score: 6.5/10. Published 2021-07-07.

How severe is CVE-2021-20738?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Elecom Wrc-1167fsa

CVE-2021-20738

WRC-1167FS-W, WRC-1167FS-B, and WRC-1167FSA all versions allow an unauthenticated network-adjacent attacker to obtain sensitive information via unspecified vectors.

Published 2021-07-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (32.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

References

www.elecom.co.jp/news/security/20210706-01/ (Vendor Advisory)
jvn.jp/en/vu/JVNVU94260088/index.html (Third Party Advisory)

Frequently asked questions

What is CVE-2021-20738?: CVE-2021-20738 is a medium-severity vulnerability in Elecom Wrc-1167fsa. CVSS score: 6.5/10. Published 2021-07-07.
How severe is CVE-2021-20738?: Medium severity. CVSS v3 base score is 6.5 out of 10.