CVE-2021-20644

Browser script execution via crafted SSID display

Published Feb 12, 2021 · Updated Aug 3, 2024

Script injection in the WRC-1467GHBK-A web setup page allows physically proximate attackers to run scripts in a viewing user's browser. The page renders an attacker-controlled wireless network name (SSID) without neutralizing script content before browser display. The target must receive and display a nearby crafted SSID, and a user must view the setup page; execution is limited to that browser context.

CVSS severity5.2
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Script injection in the WRC-1467GHBK-A web setup page allows physically proximate attackers to run scripts in a viewing user's browser. The page renders an attacker-controlled wireless network name (SSID) without neutralizing script content before browser display. The target must receive and display a nearby crafted SSID, and a user must view the setup page; execution is limited to that browser context.

The record

CVE
CVE-2021-20644
Published
Feb 12, 2021
Updated
Aug 3, 2024
Vendor
ELECOM CO., LTD.
Product
WRC-1467GHBK-A
Classifications
CWE-74, T1189
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=WRC-1467GHBK-A

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

ELECOM CO., LTD. · WRC-1467GHBK-Aversion=WRC-1467GHBK-A

Published CVSS scores

5.2JPCERT/CC and IPACVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.3JPCERT/CC and IPAAV:A/AC:L/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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