# CVE-2026-109683: UPnP Newline Injection Vulnerability in TP-Link Archer BE805

Status: published. Published: 2026-11-06. Updated: 2026-11-12.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: TPLink) — https://www.tp-link.com/us/support/download/archer-be805/#Firmware
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: TPLink) — https://www.tp-link.com/en/support/download/archer-be805/v1.20/#Firmware

## Affected products and versions

- TP-Link Systems Inc. / Archer BE805 v1: ≥ 0; < V1.6_1.5.1 Build 261102 (affected, custom); ≥ 0; < V1.20_1.5.1 Build 261102 (affected, custom). Source: CNA: TPLink

## Severity and prioritization

- CVSS 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; source: CNA: TPLink

- CVSS 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; source: NVD: f23511db-6c3e-4e32-a477-6aa17d310630

- CISA KEV: No listing in collected sources

- EPSS: 0.31% as of 2026-11-12; percentile 24.52%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-93

## 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/#Firmware (CNA: TPLink; patch)

- https://www.tp-link.com/en/support/download/archer-be805/v1.20/#Firmware (CNA: 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/#Firmware (f23511db-6c3e-4e32-a477-6aa17d310630)

- https://www.tp-link.com/us/support/download/archer-be805/#Firmware (f23511db-6c3e-4e32-a477-6aa17d310630)

- https://www.tp-link.com/us/support/faq/5389/ (f23511db-6c3e-4e32-a477-6aa17d310630)

## Provenance

- CNA: TPLink: https://www.cve.org/CVERecord?id=CVE-2026-109683; retrieved 2026-11-12; source updated 2026-11-12

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-109683; retrieved 2026-11-07; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-109683; retrieved 2026-11-12; source updated Not reported

Revision: a636b0daeba8276f6fc6a6cd22071c0456e850eca2e1280c9a0c1e1069192daa

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