CVE-2026-4346
TP-Link · published 2026-03-26
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by TPLink via the CVE Program.
The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device’s flash memory while the serial interface remains enabled and protected by weak authentication. An attacker with physical access and the ability to connect to the serial port can recover sensitive information, including the router’s management password and wireless network key. Successful exploitation can lead to full administrative control of the device and unauthorized access to the associated wireless network.
Status at the source
- NVD status: Analyzed
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| TP-Link Systems Inc. | TL-WR850N v3 | 0 – before V3_0.9.1 Build251205: affected |
Products named in NVD's CPE match criteria (1)
cpe:2.3:o:tp-link:tl-wr850n_firmware:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 5.1 MEDIUM — as published by TPLink (Secondary)
CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1: 6.8 MEDIUM — as published by NIST (Primary)
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: no · Technical impact: partial
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://www.tp-link.com/in/support/download/tl-wr850n/#Firmware
- https://www.tp-link.com/us/support/faq/5034/
Source dates: published 2026-03-26, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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