---
title: "CVE-2020-24363: TP-link TL-WA855RE Missing Authentication for Critical Function Vulnerability"
url: https://erroneo.us/security/cve/CVE-2020-24363/
description: "CVE-2020-24363 (TP-Link TL-WA855RE): Exploited in the wild (CISA KEV). TP-Link TL-WA855RE V5 20200415-rel37464 devices allow an unauthenticated attacker (on…"
type: vulnerability-record
section: "Security Digest"
date_published: 2020-08-31
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2020-24363"
kev: true
cvss: 8.8
epss: 0.22187
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2020-24363: TP-link TL-WA855RE Missing Authentication for Critical Function Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run TP-Link TL-WA855RE. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-09-02, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-09-23 ; treat that as the outer limit, not the target.
- EPSS 22.2% , percentile 98: FIRST’s model estimates a 22.2% chance of exploitation activity in the next 30 days, higher than 98% of all scored CVEs (very high). EPSS is a probability, not a verdict.

## What it is

TP-Link TL-WA855RE V5 20200415-rel37464 devices allow an unauthenticated attacker (on the same network) to submit a TDDPRESET POST request for a factory reset and reboot. The attacker can then obtain incorrect access control by setting a new administrative password.

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 8.8 `CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2025-09-02; federal due date 2025-09-23. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 22.19% probability of exploitation activity in the next 30 days; percentile 98.

## Sources

- [Listed in CISA KEV notes (tp-link.com)](https://www.tp-link.com/us/home-networking/range-extender/tl-wa855re/#overview)
- [Listed in CISA KEV notes (tp-link.com)](https://www.tp-link.com/us/support/download/tl-wa855re/#FAQs)
- [CVE.org record CVE-2020-24363](https://www.cve.org/CVERecord?id=CVE-2020-24363)
- [NVD entry CVE-2020-24363](https://nvd.nist.gov/vuln/detail/CVE-2020-24363)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-24363)
- [tp-link.com](https://www.tp-link.com/us/support/download/tl-wa855re/#Firmware)
- [malwrforensics.com](http://malwrforensics.com/en/2020/08/31/cve-2020-24363-tl-wa855re-v5-advisory/)
- [pastebin.com](https://pastebin.com/VjHM4UiA)

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Source page: https://erroneo.us/security/cve/CVE-2020-24363/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt