CVE-2021-20857
Quick assessment
Affected
ELECOM CO.,LTD. ELECOM LAN router
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
elecom lan是日本Elecom的一款路由器。 elecom lan 存在跨站脚本漏洞，该漏洞源于对用户提供的数据的清理不足。经过远程身份验证的攻击者可以诱使受害者点击特制链接，并在易受攻击的网站上下文中在用户浏览器中执行任意 HTML 和脚本代码。
Possible ATT&CK Techniques 1 AI
T1189 · Drive-by Compromise
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I. Basic Information for CVE-2021-20857
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Cross-site scripting vulnerability in ELECOM LAN router WRC-2533GHBK-I firmware v1.20 and prior allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
elecom lan 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
elecom lan是日本Elecom的一款路由器。 elecom lan 存在跨站脚本漏洞，该漏洞源于对用户提供的数据的清理不足。经过远程身份验证的攻击者可以诱使受害者点击特制链接，并在易受攻击的网站上下文中在用户浏览器中执行任意 HTML 和脚本代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ELECOM CO.,LTD. | ELECOM LAN router | WRC-2533GHBK-I firmware v1.20 and prior | - |
|
II. Public POCs for CVE-2021-20857
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2021-20857 (1)
-
https://jvn.jp/en/jp/JVN88993473/index.html x_refsource_MISC
Other References for CVE-2021-20857 (1)
-
https://www.elecom.co.jp/news/security/20211130-01/ x_refsource_MISC
Same Patch Batch · ELECOM CO.,LTD. · 2021-12-01 · 13 CVEs total
| CVE-2021-20852 | elecom lan 缓冲区错误漏洞 | |
| CVE-2021-20853 | elecom lan 操作系统命令注入漏洞 | |
| CVE-2021-20854 | elecom lan 操作系统命令注入漏洞 | |
| CVE-2021-20855 | elecom lan 跨站脚本漏洞 | |
| CVE-2021-20856 | elecom lan 跨站脚本漏洞 | |
| CVE-2021-20858 | elecom lan 跨站脚本漏洞 | |
| CVE-2021-20859 | elecom lan 操作系统命令注入漏洞 | |
| CVE-2021-20860 | elecom lan 跨站请求伪造漏洞 | |
| CVE-2021-20861 | elecom lan 授权问题漏洞 | |
| CVE-2021-20862 | Elecom Edwrc 访问控制错误漏洞 | |
| CVE-2021-20863 | Elecom Edwrc 操作系统操作系统命令注入漏洞 | |
| CVE-2021-20864 | Elecom Edwrc 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-20857
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