TI-2019-12798 Aliases CVE-2019-17147 GHSA-9chw-9f2x-67h9

Buffer overflow in TP-Link TL-WR841N

MEDIUM 53CWE-120Published 2020-01-07 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.13651 96th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
TP-Link	TL-WR841N	0.9.1 4.16 v007c.0 Build 180613 Rel.42415n	—	No fix listed	CNA

TL-WR841N VendorTP-Link Affected 0.9.1 4.16 v007c.0 Build 180613 Rel.42415n Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:tp-link:tl-wr841n_firmware:0.9.1_4.16:::::::*	0.9.1_4.16	Vulnerable	TP-Link
cpe:2.3:h:tp-link:tl-wr841n:-:::::::*	not specified by NVD	Running on	TP-Link

cpe:2.3:o:tp-link:tl-wr841n_firmware:0.9.1_4.16:*:*:*:*:*:*:* Versions 0.9.1_4.16 Vulnerable ·TP-Link
cpe:2.3:h:tp-link:tl-wr841n:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TP-Link

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2019-17147
2026-10-03 Alias added: GHSA-9chw-9f2x-67h9

References

Advisory 1

https://www.zerodayinitiative.com/advisories/ZDI-19-992/

Other 1

https://www.tp-link.com/us/support/download/tl-wr841n/#Firmware

TI-2023-16571 TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain… KEVCVSS 3.1HIGH 8.8
TI-2025-08589 Authenticated RCE via Parental Control command injection KEVCVSS 4.0HIGH 8.6
TI-2015-02672 Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317… KEVCVSS 3.1HIGH 7.5
TI-2023-27456 Authentication bypass by spoofing in TP-Link TL-WR841N KEVCVSS 3.1MEDIUM 6.5
TI-2018-08378 An issue was discovered on TP-Link TL-WR840N v5 00000005 0.9.1 3.16 v0001.0 Build 170608… CVSS 3.0CRITICAL 9.8
TI-2026-02790 Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N CVSS 4.0HIGH 8.5

See all 38 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences