Answer in brief
CVE-2026-109506 records a Medium severity (CVSS 5.9) vulnerability in Improper Authentication in Multiple TP-Link WiFi Repeaters. The current sources do not mark it as known exploited. The current feed maps TP-Link Systems Inc./RE190 v5 (generic), TP-Link Systems Inc./RE200 v5 (generic), TP-Link Systems Inc./RE205 v4 (generic), TP-Link Systems Inc./RE215 v1 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps TP-Link Systems Inc./RE190 v5 (generic), TP-Link Systems Inc./RE200 v5 (generic), TP-Link Systems Inc./RE205 v4 (generic), TP-Link Systems Inc./RE215 v1 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| TP-Link Systems Inc./RE190 v5generic | >=0 <V5_260904 | V5_260904 |
| TP-Link Systems Inc./RE200 v5generic | >=0 <V5_260904 | V5_260904 |
| TP-Link Systems Inc./RE205 v4generic | >=0 <V4_260904 | V4_260904 |
| TP-Link Systems Inc./RE215 v1generic | >=0 <V1_260904 | V1_260904 |
| TP-Link Systems Inc./RE220 v3generic | >=0 <V3_260904 | V3_260904 |
| TP-Link Systems Inc./RE230 v2generic | >=0 <V2_260904 | V2_260904 |
| TP-Link Systems Inc./RE300 v2generic | >=0 <V2_260904 | V2_260904 |
| TP-Link Systems Inc./RE305 v4generic | >=0 <V4_260904 | V4_260904 |
| TP-Link Systems Inc./RE315 v1generic | >=0 <V1_260904 rel3959 | V1_260904 rel3959, V1_260904 |
| TP-Link Systems Inc./RE330 v1generic | >=0 <V1_260904 | V1_260904 |
| TP-Link Systems Inc./RE335 v1generic | >=0 <V1_260904 | V1_260904 |
| TP-Link Systems Inc./RE365 v2generic | >=0 <V2_260904 | V2_260904 |
| TP-Link Systems Inc./RE365 v3generic | >=0 <V3_260904 | V3_260904 |
| TP-Link Systems Inc./RE450 v4.8generic | >=0 <V4_260915 | V4_260915 |
| TP-Link Systems Inc./RE550 v1generic | >=0 <V1_260915 | V1_260915 |
| TP-Link Systems Inc./RE750C v4generic | >=0 <V4_260904 | V4_260904 |
Published upstream
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 14, 2026
Multiple TP-Link Wi-Fi range extenders use a custom, reversible XOR-and-dictionary transformation in the HTTP web-management login flow. An unauthenticated attacker on the same local network who can capture the network traffic associated with legitimate administrator login may be able to derive an alternative credential value that produces the same accepted authentication result and use it to authenticate to the device’s web-management interface with administrator privileges. Exploitation requires the management login to use HTTP and the attacker to observe the session key, dictionary, and login value associated with a legitimate administrator login. Successful exploitation may allow an unauthenticated adjacent attacker to gain administrator access to the affected device and modify exposed configuration settings.
Quoted source text, attributed separately from HOL analysis.