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CVE-2021-27245

Quick assessment

Affected
TP-Link Archer A7
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.

Tp-link TP-Link Archer A7是中国普联（Tp-link）公司的一款无线路由器。 TP-Link Archer A7 prior to Archer C7(US)_V5_210125 and Archer A7(US)_V5_200220 AC1750 routers 存在安全漏洞，该漏洞源于没有对IPv6 SSH连接进行适当的过滤。攻击者可利用该漏洞可以利用这一点和其他漏洞一起在root上下文中执行代码。

AI Predicted 9.8 Difficulty: Moderate EPSS 3.21% · P88
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I. Basic Information for CVE-2021-27245

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This vulnerability allows a firewall bypass on affected installations of TP-Link Archer A7 prior to Archer C7(US)_V5_210125 and Archer A7(US)_V5_200220 AC1750 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of IPv6 connections. The issue results from the lack of proper filtering of IPv6 SSH connections. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-12309.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link Archer A7 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tp-link TP-Link Archer A7是中国普联（Tp-link）公司的一款无线路由器。 TP-Link Archer A7 prior to Archer C7(US)_V5_210125 and Archer A7(US)_V5_200220 AC1750 routers 存在安全漏洞，该漏洞源于没有对IPv6 SSH连接进行适当的过滤。攻击者可利用该漏洞可以利用这一点和其他漏洞一起在root上下文中执行代码。
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
TP-Link Archer A7 prior to Archer C7(US)_V5_210125 and Archer A7(US)_V5_200220 -

II. Public POCs for CVE-2021-27245

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III. Intelligence Information for CVE-2021-27245

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Vendor Advisories for CVE-2021-27245 (1)

IV. Related Vulnerabilities

Same product: Archer A7
Same vendor: TP-Link
Same weakness: CWE-693

V. Comments for CVE-2021-27245

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