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

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 and reboot. The attacker can then obtain incorrect access control by setting a new administrative password.

01What is this vulnerability?

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 and reboot. The attacker can then obtain incorrect access control by setting a new administrative password.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2025-09-02. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-08-31T15:49:15.000Z
• Last modified: 2025-10-21T23:35:37.336Z
• Added to CISA KEV: 2025-09-02
• BOD 22-01 due: 2025-09-23

09References

• www.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