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Vulnerability record · CVE-2023-39747 · published 21 August 2023

CVE-2023-39747: Tp-link tl-wr940n v2 firmware classic buffer overflow vulnerability

Tp Link · Tl Wr940n V2 Firmware

TP-Link WR841N V8, TP-Link TL-WR940N V2, and TL-WR941ND V5 were discovered to contain a buffer overflow via the radiusSecret parameter at /userRpm/WlanSecurityRpm.

9.8 CVSS 3.1 Critical EPSS 8.7% · top 5.0% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score
8.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

TP-Link WR841N V8, TP-Link TL-WR940N V2, and TL-WR941ND V5 were discovered to contain a buffer overflow via the radiusSecret parameter at /userRpm/WlanSecurityRpm.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/a101e-IoTvul/iotvul/blob/main/tp-link/17/TP-Link%20WR841N%20wireless%20router%20WlanSecurityRpm%20Sta ExploitThird Party Advisory
https://github.com/a101e-IoTvul/iotvul/blob/main/tp-link/17/TP-Link%20WR841N%20wireless%20router%20WlanSecurityRpm%20Sta ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-39747), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.