CVE-2026-3622
highpriority · track · 30EPSS 0.004 · 31 %ileEUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmwarecnnvd
- https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmwarecnnvd
- https://www.tp-link.com/us/support/faq/5033/cnnvd
- https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmwareenisa_euvd
- https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmwareenisa_euvd
- https://www.tp-link.com/us/support/faq/5033/enisa_euvd
- https://www.tp-link.com/en/support/download/tl-wr841n/v14/#FirmwareProductnvd
- https://www.tp-link.com/us/support/download/tl-wr841n/v14/#FirmwareProductnvd
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