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CVE-2021-21816

Quick assessment

Affected
n/a D-LINK
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

D-Link D-LINK DIR-3040是中国台湾友讯（D-Link）公司的一个路由器。提供连接网络的功能。 D-LINK DIR-3040 存在信息泄露漏洞，攻击者可以发送HTTP请求导致敏感信息的泄露。

AI Predicted 5.3 Difficulty: Easy EPSS 32.39% · P98

Public Exploits 1

Nuclei · 1 CVE-2021-21816.yaml [template]

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2021-21816

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
D-LINK DIR-3040 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link D-LINK DIR-3040是中国台湾友讯（D-Link）公司的一个路由器。提供连接网络的功能。 D-LINK DIR-3040 存在信息泄露漏洞，攻击者可以发送HTTP请求导致敏感信息的泄露。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
- D-LINK D-LINK DIR-3040 1.13B03 -

II. Public POCs for CVE-2021-21816

# POC Description Source Link Shenlong Link
1 D-Link DIR-3040 1.13B03 is susceptible to information disclosure in the Syslog functionality. A specially crafted HTTP network request can lead to the disclosure of sensitive information. An attacker can obtain access to user accounts and access sensitive information, modify data, and/or execute unauthorized operations. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-21816.yaml POC Details
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III. Intelligence Information for CVE-2021-21816

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Other References for CVE-2021-21816 (1)

Same Patch Batch · n/a · 2021-07-16 · 15 CVEs total

CVE-2021-36769 Telegram 加密问题漏洞
CVE-2021-28053 Centreon SQL注入漏洞
CVE-2021-28054 Centreon 跨站脚本漏洞
CVE-2021-28114 Froala WYSIWYG Editor 跨站脚本漏洞
CVE-2021-21803 Advantech R-SeeNet 跨站脚本漏洞
CVE-2021-21802 Advantech R-SeeNet 跨站脚本漏洞
CVE-2021-21801 Advantech R-SeeNet 跨站脚本漏洞
CVE-2021-21804 Advantech R-SeeNet 安全漏洞
CVE-2021-21800 Advantech R-SeeNet 跨站脚本漏洞
CVE-2021-21799 Advantech R-SeeNet 跨站脚本漏洞
CVE-2021-21817 D-LINK DIR-3040 信息泄露漏洞
CVE-2021-21818 D-Link D-LINK DIR-3040 信任管理问题漏洞
CVE-2021-21819 D-LINK DIR-3040 操作系统命令注入漏洞
CVE-2021-21820 D-LINK DIR-3040 信任管理问题漏洞

IV. Related Vulnerabilities

Same product: D-LINK
Same vendor: n/a
Same weakness: CWE-200

V. Comments for CVE-2021-21816

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