CVE-2021-41653
9.8
CRITICAL · CVSS 3.1 · EPSS 76% (pctl 100)
Patch early
EPSS 76% — above the 10% action threshold.
Description
The PING function on the TP-Link TL-WR840N EU v5 router with firmware through TL-WR840N(EU)_V5_171211 is vulnerable to remote code execution via a crafted payload in an IP address input field.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 76.05% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-94 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-11-13 |
| Last modified | 2026-07-09 |
Affected (2)
| Vendor | Product |
|---|---|
| tp-link | tl-wr840n |
| tp-link | tl-wr840n firmware |
References
→ the Explorer · watch your stack · NVD