Security Digest · Vulnerability record · Known exploited
CVE-2020-24363: TP-link TL-WA855RE Missing Authentication for Critical Function Vulnerability
Exploited in the wild (CISA KEV). 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.
CISA KEV · added 2025-09-02 CVSS 8.8 High EPSS 22.2% · p98
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- 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.
CISA’s summary
TP-link TL-WA855RE contains a missing authentication for critical function vulnerability. This vulnerability could 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. The impacted products could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
Weakness type: CWE-306.
Product: TP-Link TL-WA855RE · Assigned by: mitre · Published: 2020-08-31
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 8.8 High | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: adjacent network only
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- 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.
Timeline
- — CVE record published by mitre
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (tp-link.com) tp-link.com
- Listed in CISA KEV notes (tp-link.com) tp-link.com
Vulnerability records
- CVE.org record CVE-2020-24363 cve.org
- NVD entry CVE-2020-24363 nvd.nist.gov
Government
Other references from the CVE record and advisory
- tp-link.com tp-link.com
- malwrforensics.com malwrforensics.com
- pastebin.com pastebin.com
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