CVE-2026-109683
UPnP Newline Injection Vulnerability in TP-Link Archer BE805
A newline injection vulnerability exists in the UPnP service of Archer BE805 v1 such that an adjacent attacker can supply newline characters in a UPnP port-mapping description due to improper sanitization, resulting in possible injection of unintended content into UPnP port-mapping data. Successful exploitation may allow an unauthenticated attacker on the local network to modify runtime UPnP port-mapping information and create spoofed entries within the affected service. The issue is limited to the integrity of UPnP mapping data and does not demonstrate code execution or privilege escalation.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: TPLinkFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: TPLinkAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Archer BE805 v1 TP-Link Systems Inc. |
≥ 0; < V1.6_1.5.1 Build 261102 (affected, custom) ≥ 0; < V1.20_1.5.1 Build 261102 (affected, custom) Other versions: unaffected |
CNA: TPLink |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.3 medium |
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | CNA: TPLink |
| 4.0 / 5.3 medium |
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: f23511db-6c3e-4e32-a477-6aa17d310630 |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.tp-link.com/us/support/download/archer-be805/#FirmwareCNA: TPLink · patch
- https://www.tp-link.com/en/support/download/archer-be805/v1.20/#FirmwareCNA: TPLink · patch
- https://www.tp-link.com/us/support/faq/5389/CNA: TPLink · vendor-advisory
- https://www.tp-link.com/en/support/download/archer-be805/v1.20/#Firmwaref23511db-6c3e-4e32-a477-6aa17d310630
- https://www.tp-link.com/us/support/download/archer-be805/#Firmwaref23511db-6c3e-4e32-a477-6aa17d310630
- https://www.tp-link.com/us/support/faq/5389/f23511db-6c3e-4e32-a477-6aa17d310630
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