CVE-2020-24363KEV · OVERDUE

TP-link TL-WA855RE Missing Authentication for Critical Function Vulnerability

High · published August 31, 2020

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.8. It is confirmed in active exploitation. It sits in the 97.7th percentile for exploit probability.

396
days past CISA
deadline
CVSS v3.1
8.8
EPSS
22%
Percentile
97.7
In the wild
Confirmed
What it is

🚨 A simple POST request can wipe your TP-Link TL-WA855RE device clean! An attacker on the same network can reset it and take control, all without breaking a sweat. ⚡ Think of it like a guest at a dinner party who finds the reset button on your fancy smart oven. With a quick press, they could set it back to factory settings, and suddenly their cooking skills are the only ones in the kitchen! This means an attacker could reset your device, reboot it, and gain unauthorized access by setting a new admin password. If they’re feeling particularly mischievous, they could take full control of your network devices, leading to data theft or even worse!

Put simply

Think of it like a guest at a dinner party who finds the reset button on your fancy smart oven. With a quick press, they could set it back to factory settings, and suddenly their cooking skills are the only ones in the kitchen! This vulnerability allows an unauthenticated user on the same network to send a TDDP_RESET POST request, triggering a factory reset and enabling them to alter admin credentials.

What to do

This means an attacker could reset your device, reboot it, and gain unauthorized access by setting a new admin password. If they’re feeling particularly mischievous, they could take full control of your network devices, leading to data theft or even worse! To protect yourself, immediately update the firmware of your TL-WA855RE to the latest version. Consider changing your network configuration to limit access to trusted devices only. 🛡️ You've got this! By following these steps, you can regain control and keep your network safe. Let's patch it up! 🎉

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.22187 · 97.7th percentile
Published
2020-08-31T15:49Z
KEV added
2025-09-02 · due 2025-09-23
EPSS history
Timeline
  • 02 SEP 00:00Z
    Added to CISA KEV — remediate by Sep 23
    kev
  • 31 AUG 15:49Z
    TP-Link TL-WA855RE V5 20200415-rel37464 devices allow an unauthenticated attacker (on the same network) to submit a TDDP_RESET POST request for a factory reset…
    cvelistv5