CVE-2021-20731 json
WSR-1166DHP3 firmware Ver.1.16 and prior and WSR-1166DHP4 firmware Ver.1.02 and prior allow an attacker to execute arbitrary OS commands wi…
published 2021-06-09 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8145
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
WSR-1166DHP3 firmware Ver.1.16 and prior and WSR-1166DHP4 firmware Ver.1.02 and prior allow an attacker to execute arbitrary OS commands with root privileges via unspecified vectors.
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 8.3 | AV:A/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- BUFFALO INC. WSR-1166DHP3 and WSR-1166DHP4
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
buffalo.jp
/news/detail/20210531-01.html
vendor-advisory
-
jvn.jp
/en/vu/JVNVU92862829/index.html
third-party-advisory
Sources
- CVE List CVE-2021-20731
- NVD CVE-2021-20731
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