CVE-2019-17147

Name: CVE-2019-17147
Creator: NVD / NIST
Published: 2020-01-07T23:15:10.967+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 13.65%

Last modified Jun 17, 2026

CVE-2019-17147 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers. Authentication is not required to exploit this vulnerability. EPSS estimates a 13.65% chance of exploitation in the next 30 days.

Description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 80 by default. When parsing the Host request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length static buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-8457.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

13.65%

96.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tp-Link	Tl-Wr841n Firmware	0.9.1_4.16

References

https://www.tp-link.com/us/support/download/tl-wr841n/#FirmwareProduct
https://www.zerodayinitiative.com/advisories/ZDI-19-992/Third Party Advisory, VDB Entry
https://www.tp-link.com/us/support/download/tl-wr841n/#FirmwareProduct
https://www.zerodayinitiative.com/advisories/ZDI-19-992/Third Party Advisory, VDB Entry

Timeline

Published: Jan 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-17147?

How severe is CVE-2019-17147?

CVE-2019-17147 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 13.65% probability of exploitation in the next 30 days.

How do I fix CVE-2019-17147?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-17147?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST