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Vulnerability record · CVE-2021-27246 · published 14 April 2021

CVE-2021-27246: Tp-link ac1750 firmware stack-based buffer overflow vulnerability

Tp Link · Ac1750 Firmware

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.

8.0 CVSS 3.1 High EPSS 6.6% · top 6.4% CWE-121 · Stack-based buffer overflow
8.0CVSS 3.1 base score, v2 7.9
6.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.zerodayinitiative.com/advisories/ZDI-21-215/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-215/ Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-28347TP-Link Archer A7 tdpServer OS command injection via slave_mactdpServer on TP-Link Archer A7 AC1750 devices before firmware 201029 mishandles shell quotes in the slave_mac parameter, allowing OS command injectio…EPSS 75%analysed9.8CVE-2020-10885Tp-link ac1750 firmware improper input validation vulnerabilityThis vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer A7 Firmware Ver: 190726 AC1750 route…EPSS 6.5%9.8CVE-2020-10886Tp-link ac1750 firmware os command injection vulnerabilityThis vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer A7 Firmware Ver: 190726 AC1750 route…EPSS 5.0%9.8CVE-2020-10887Tp-link ac1750 firmware vulnerabilityThis vulnerability allows a firewall bypass on affected installations of TP-Link Archer A7 Firmware Ver: 190726 AC1750 routers. Authentication is not…EPSS 3.7%9.8CVE-2020-10888Tp-link ac1750 firmware improper authentication vulnerabilityThis vulnerability allows remote attackers to bypass authentication on affected installations of TP-Link Archer A7 Firmware Ver: 190726 AC1750 router…EPSS 2.2%9.8CVE-2020-10881Tp-link ac1750 firmware stack-based buffer overflow vulnerabilityThis vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer A7 Firmware Ver: 190726 AC1750 route…EPSS 9.3%8.8CVE-2022-24352Tp-link ac1750 firmware out-of-bounds read vulnerabilityThis vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link AC1750 prior to 211210 routers. A…EPSS 0.74%8.8CVE-2022-24353Tp-link ac1750 firmware out-of-bounds read vulnerabilityThis vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link AC1750 1.1.4 Build 20211022 rel.5…EPSS 0.74%

Source: NIST National Vulnerability Database (record CVE-2021-27246), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.