CVE-2021-41653

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.

CVSS v3.1

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

CVSS v2.0

10.0 HIGHAV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS

76.05% chance of exploitation in the next 30 days, 99th percentile

Nuclei

critical · CWE-94

Published

2021-11-13

Updated

2026-07-09

Proof-of-concept exploits (2)

• https://k4m1ll0.com/cve-2021-41653.html
• likeww/CVE-2021-416530★ · 2021-11-28

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-41653.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2021-24160
• CVE-2021-41651
• CVE-2021-41654
• CVE-2021-41649
• CVE-2021-41657
• CVE-2021-41648