CVE-2025-59487
Published: 03 February 2026
Summary
CVE-2025-59487 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Tp-Link Archer Ax53 Firmware. Its CVSS base score is 8.0 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 7.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mitigates the vulnerability by requiring timely identification, reporting, testing, and deployment of firmware updates to correct the heap-based buffer overflow flaw.
Requires validation of packet fields, including offsets, at network interfaces to prevent improper use of unvalidated inputs leading to arbitrary memory writes.
Implements memory safeguards such as heap canaries or randomization to limit the impact of heap-based buffer overflows even if input validation fails.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap buffer overflow enables remote exploitation of the router service for privilege escalation and arbitrary code execution via crafted packets.
NVD Description
Heap-based Buffer Overflow vulnerability in TP-Link Archer AX53 v1.0 (tmpserver modules) allows authenticated adjacent attackers to cause a segmentation fault or potentially execute arbitrary code. The vulnerability arises from improper validation of a packet field whose offset is used to…
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determine the write location in memory. By crafting a packet with a manipulated field offset, an attacker can redirect writes to arbitrary memory locations.This issue affects Archer AX53 v1.0: through 1.3.1 Build 20241120.
Deeper analysisAI
CVE-2025-59487 is a heap-based buffer overflow vulnerability (CWE-122) in the tmpserver modules of the TP-Link Archer AX53 v1.0 router firmware. The issue stems from improper validation of a packet field whose offset determines the write location in memory, enabling attackers to craft packets that redirect writes to arbitrary memory locations. This flaw affects Archer AX53 v1.0 firmware versions through 1.3.1 Build 20241120 and carries a CVSS v3.1 base score of 8.0 (AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Authenticated attackers on the adjacent network (AV:A, PR:L) can exploit this vulnerability by sending specially crafted packets to the affected device. Successful exploitation may cause a segmentation fault, leading to denial of service, or potentially allow arbitrary code execution with elevated privileges, granting high confidentiality, integrity, and availability impacts.
Mitigation is available through firmware updates from TP-Link, accessible via regional support download pages such as those for the US and Malaysia. Additional details on the vulnerability, including technical analysis, are provided in the Talos Intelligence advisory (TALOS-2025-2285) and a related TP-Link FAQ. Security practitioners should verify and apply the latest firmware to vulnerable Archer AX53 v1.0 devices.
Details
- CWE(s)