CVE-2026-3622

HIGH

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition.  This vulnerability affects TL-WR841N v14 < EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and < US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304).

CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Published: 3/26/2026Modified: 3/31/2026

Related Intelligence (1)

HIGHVulnerability

NVD HIGH: CVE-2026-3622 — The vulnerability exists in the UPnP component of TL-WR841N v14, where improper ...

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition.  This vulnerability affects TL-WR841N v14 < EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and < US_0.9.1.4.19

CVE-2026-3622
NIST NVD

References (3)

https://www.tp-link.com/en/support/download/tl-wr841n/v14/#FirmwareProducthttps://www.tp-link.com/us/support/download/tl-wr841n/v14/#FirmwareProducthttps://www.tp-link.com/us/support/faq/5033/Vendor Advisory