Cybersecurity researchers have uncovered five significant security vulnerabilities in the TP-Link Archer AX53 v1.0 router.
If left unpatched, these critical flaws could allow attackers to take full control of the device, steal sensitive network data, and compromise connected systems.
Because routers serve as the primary gateway for all internet traffic, compromising this device gives attackers a dangerous foothold into homes and small businesses.
The vulnerabilities exist across several core router components, including the server functions, domain name systems, and virtual private network modules.
While these flaws require an attacker to have local network access to exploit the device, the severity of the bugs makes this a high-priority issue.
TP-Link Devices Flaw
Command Injection Risks
The most severe issues discovered are OS command injection vulnerabilities. These flaws occur when a system fails to properly check the input it receives, allowing a malicious actor to slip hidden system commands into the router’s configuration files.
- CVE-2026-30815 affects the OpenVPN module and allows an authenticated attacker to execute system-level commands, modify settings, and compromise device integrity.
- CVE-2026-30818 impacts the dnsmasq module and carries similar risks, granting attackers the ability to run arbitrary code and manipulate the network configuration.
Both vulnerabilities received a High severity CVSS v4.0 score of 8.5. If an attacker successfully exploits them, they essentially hold the keys to the router and all the private traffic passing through it.
Memory Overflow Flaws
Researchers also identified a serious memory corruption issue known as a stack-based buffer overflow.
- CVE-2026-30814 affects the tmpServer module and allows an attacker to overwhelm the router’s memory limits using a specially crafted configuration file.
This vulnerability carries a CVSS score of 7.3. When triggered, it can cause the router to crash entirely and disrupt network access.
In worse scenarios, an attacker can use this memory overflow to force the device to execute malicious code, altering the system state and exposing user data.
Data Exposure Threats
Beyond system takeovers and crashes, the router suffers from external configuration control vulnerabilities that put user privacy at direct risk.
- CVE-2026-30816 and CVE-2026-30817 affect the OpenVPN and dnsmasq modules by failing to restrict file access properly.
These medium-severity flaws allow local attackers to read arbitrary files stored on the router. By processing a rigged configuration file, hackers can bypass normal access controls to view sensitive system information that should remain private.
These vulnerabilities specifically impact the TP-Link Archer AX53 v1.0 running firmware versions older than 1.7.1 Build 20260213.
It is worth noting that this specific hardware version is not sold in the United States, but it is widely used in other global markets.
To secure your network, you should take immediate action to patch these flaws. Users must download and install the latest firmware update directly from the official TP-Link support portal.
Failing to apply these critical updates leaves the router completely exposed to local network attacks.
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