# BUFFALO INC. Buffalo network devices: Hidden functionality in multiple Buffalo network devices (BHR-4RV firmware Ver.2.55 and…

CVE record · `CVE-2021-20716`

- **Identifiers:** `CVE-2021-20716`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** jpcert
- **Technologies:** [BUFFALO INC. Buffalo network devices](https://agentprime.io/advisories/technology/buffalo-inc-buffalo-network-devices.md)
- **Published:** 28 Apr 2021
- **Updated:** 3 Aug 2024
- **Reviewed by a person:** No

Published by the CVE Program (CNA: jpcert) at 28 Apr 2021, 00:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: BUFFALO INC.. Product: Buffalo network devices.
  - affected: `BHR-4RV firmware Ver.2.55 and prior, FS-G54 firmware Ver.2.04 and prior, WBR2-B11 firmware Ver.2.32 and prior, WBR2-G54 firmware Ver.2.32 and prior, WBR2-G54-KD firmware Ver.2.32 and prior, WBR-B11 firmware Ver.2.23 and prior, WBR-G54 firmware Ver.2.23 and prior, WBR-G54L firmware Ver.2.20 and prior, WHR2-A54G54 firmware Ver.2.25 and prior, WHR2-G54 firmware Ver.2.23 and prior, WHR2-G54V firmware Ver.2.55 and prior, WHR3-AG54 firmware Ver.2.23 and prior, WHR-G54 firmware Ver.2.16 and prior, WHR-G54-NF firmware Ver.2.10 and prior, WLA2-G54 firmware Ver.2.24 and prior, WLA2-G54C firmware Ver.2.24 and prior, WLA-B11 firmware Ver.2.20 and prior, WLA-G54 firmware Ver.2.20 and prior, WLA-G54C firmware Ver.2.20 and prior, WLAH-A54G54 firmware Ver.2.54 and prior, WLAH-AM54G54 firmware Ver.2.54 and prior, WLAH-G54 firmware Ver.2.54 and prior, WLI2-TX1-AG54 firmware Ver.2.53 and prior, WLI2-TX1-AMG54 firmware Ver.2.53 and prior, WLI2-TX1-G54 firmware Ver.2.20 and prior, WLI3-TX1-AMG54 firmware Ver.2.53 ...[truncated*]`

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.032, the 88th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 28 Apr 2021. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2021-20716](https://www.cve.org/CVERecord?id=CVE-2021-20716)
- [NVD: CVE-2021-20716](https://nvd.nist.gov/vuln/detail/CVE-2021-20716)

### References from the CNA

- <https://www.buffalo.jp/news/detail/20210427-02.html>
- <https://jvn.jp/en/vu/JVNVU90274525/index.html>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2021-20716>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2021-20716/>. Everything for agents: <https://agentprime.io/llms.txt>.