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CVE-2021-27246

Status: ModifiedHigh (8)—💥 PoC

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

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Tp-link — Ac1750 Firmware

CWEs

References

Raw JSON (NVD)

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  "published": "2021-04-14T16:15:13.127",
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      "value": "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."
    },
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      "value": "Esta vulnerabilidad permite a atacantes adyacentes a la red ejecutar código arbitrario en las instalaciones afectadas de los enrutadores TP-Link Archer A7 AC1750 versión 1.0.15. No es requerida una autenticación para explotar esta vulnerabilidad. El fallo específico se presenta dentro del manejo de direcciones MAC por parte del endpoint tdpServer. Un mensaje TCP diseñado puede escribir punteros stack en la pila. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto del usuario root. Era ZDI-CAN-12306"
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  "lastModified": "2026-06-17T03:44:32.410",
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