CVE-2026-30818: An OS command injection vulnerability in the dnsmasq module of TP-Link Archer AX53 v1.0 allows an authenticate

Q: How do I fix CVE-2026-30818?

archer ax53 firmware: upgrade to 1.7.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-30818 being exploited?

CVE-2026-30818 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-30818 affect?

CVE-2026-30818 affects archer ax53 firmware. Severity is high (CVSS 8.0). 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 v

This month

HIGH 8.0UPGRADE

CVE-2026-30818 is a high-severity flaw (CVSS 8.0) affecting archer ax53 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-04-08
Last modified	2026-07-25

Publisher (CNA): TPLink · Vendor: tp-link

Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 19:25 UTCPublished CVE record published
2026-07-25 11:10 UTCUpdated Record last modified

tp-link archer ax53 firmware UPGRADE

Affected: < 1.7.1

Fixed in: 1.7.1

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-30818?

archer ax53 firmware: upgrade to 1.7.1. Exact commands for each OS are on this page.

Is CVE-2026-30818 being exploited?

CVE-2026-30818 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-30818 affect?

CVE-2026-30818 affects archer ax53 firmware. Severity is high (CVSS 8.0). 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 v

How urgent is CVE-2026-30818?

Priority 45/100. High severity

Software pages

TP-Link vulnerabilities · Dnsmasq vulnerabilities

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CVE-2025-15608 CRITICAL 9.8 MITIGATE This vulnerability in AX53 v1, AX55 v4 and AX55 v4.6 results from insufficient input sanitization in the devic
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References

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