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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tp-Link | Archer A7 Firmware | < c7\(us\)_v5_210125 |
| Tp-Link | Archer A7 | - |
Related Weaknesses (CWE)
References
- https://www.zerodayinitiative.com/advisories/ZDI-21-214/Third Party AdvisoryVDB Entry
- https://www.zerodayinitiative.com/advisories/ZDI-21-214/Third Party AdvisoryVDB Entry
FAQ
What is CVE-2021-27245?
CVE-2021-27245 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 t...
How severe is CVE-2021-27245?
CVE-2021-27245 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-27245?
Check the references section above for vendor advisories and patch information. Affected products include: Tp-Link Archer A7 Firmware, Tp-Link Archer A7.