CVE-2021-27246

Name: CVE-2021-27246
Creator: NVD / NIST
Published: 2021-04-14T16:15:13.127+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8/10EPSS 6.60%

Last modified Jun 17, 2026

CVE-2021-27246 is a high-severity vulnerability rated 8/10 on the CVSS scale. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer A7 AC1750 1.0.15 routers. Authentication is not required to exploit this vulnerability. EPSS estimates a 6.60% chance of exploitation in the next 30 days.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer A7 AC1750 1.0.15 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of MAC addresses by the tdpServer endpoint. A crafted TCP message can write stack pointers to the stack. An attacker can leverage this vulnerability to execute code in the context of the root user. Was ZDI-CAN-12306.

Metrics

CVSS 3.1

8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

6.60%

93.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-121

Affected Software

Vendor	Product	Versions
Tp-Link	Ac1750 Firmware	1.0.15

References

https://www.zerodayinitiative.com/advisories/ZDI-21-215/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-215/Third Party Advisory, VDB Entry

Timeline

Published: Apr 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27246?

How severe is CVE-2021-27246?

CVE-2021-27246 has a CVSS score of 8/10 (HIGH severity). The EPSS model estimates a 6.60% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27246?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27246?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST