Home/CVE/The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-boun
CVE

CVE-2026-3622

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-boun

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).

HIGH · CVSS 7.5 EPSS 0.00052
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-125Out-of-bounds Read
▤

Affected Products & Versions

1
tp-link tl-wr841n firmware< 0.9.1_4.19
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · f23511db-6c3e-4e32-a477-6aa17d310630
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Mar 2026 · 09:17 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.tp-link.com/en/support/download/tl-wr841n/v14/#FirmwareProduct
https://www.tp-link.com/us/support/download/tl-wr841n/v14/#FirmwareProduct
https://www.tp-link.com/us/support/faq/5033/Vendor Advisory
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