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Vulnerability record · CVE-2018-18489 · published 16 April 2019

CVE-2018-18489: Tp-link wr840n firmware vulnerability

Tp Link · Wr840n Firmware

The ping feature in the Diagnostic functionality on TP-LINK WR840N v2 Firmware 3.16.9 Build 150701 Rel.51516n devices allows remote attackers to cause a denial of service (HTTP service termination) by modifying the packet size to be higher than the UI limit of 1472.

4.9 CVSS 3.0 Medium EPSS 1.7% · top 22.9%
4.9CVSS 3.0 base score, v2 6.8
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The ping feature in the Diagnostic functionality on TP-LINK WR840N v2 Firmware 3.16.9 Build 150701 Rel.51516n devices allows remote attackers to cause a denial of service (HTTP service termination) by modifying the packet size to be higher than the UI limit of 1472.

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://youtu.be/VGNEYWR9MgY ExploitThird Party Advisory
https://youtu.be/VGNEYWR9MgY ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-35575Tp-link wa901nd firmware vulnerabilityA password-disclosure issue in the web interface on certain TP-Link devices allows a remote attacker to get full administrative access to the web pan…EPSS 7.6%

Source: NIST National Vulnerability Database (record CVE-2018-18489), CISA KEV, FIRST EPSS (scores of 2026-10-09). This page is refreshed as NVD updates the record.