TI-2026-65367 Aliases CVE-2026-102370 GHSA-6p9x-mrgq-g8cr

Physical UART Access Leading to an Unauthenticated Root Shell in TP-Link Kasa EC70 and EC71

LOW 26CWE-1191Published 2026-10-01 · Updated 2026-10-01

Key facts

Attack vector: Physical
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Kasa EC70 v4 and EC71 v4 do not logically disable the production debug interface at the firmware or chip level and do not lock the bootloader. Although the debug traces are physically severed during manufacturing, an attacker with physical access can restore the connection, interrupt the boot process, and manipulate boot parameters to enter a non-standard initialization path that exposes an unauthenticated root shell during startup. Successful exploitation may allow an attacker with physical access to obtain root-level command access during device startup, resulting in loss of confidentiality, integrity, and availability for the affected device. Exploitation requires device disassembly, restoration of the severed debug connection, and manipulation of the boot process.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00179 7th percentileScored 2026-11-07

Fix Fixed Kasa EC70 V4 (TP-Link Systems Inc.): 2.4.3 Build 20260902 rel.4511Kasa EC71 V4 (TP-Link Systems Inc.): 2.4.3 Build 20260902 rel.4511

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
TP-Link	Kasa EC70 V4	before 2.4.3 Build 20260902 rel.4511	2.4.3 Build 20260902 rel.4511	Patch available	CNA
TP-Link	Kasa EC71 V4	before 2.4.3 Build 20260902 rel.4511	2.4.3 Build 20260902 rel.4511	Patch available	CNA

Kasa EC70 V4 VendorTP-Link Affected before 2.4.3 Build 20260902 rel.4511 Fixed in 2.4.3 Build 20260902 rel.4511 Patch available CNA
Kasa EC71 V4 VendorTP-Link Affected before 2.4.3 Build 20260902 rel.4511 Fixed in 2.4.3 Build 20260902 rel.4511 Patch available CNA

Remediation

Fix · CNA Kasa EC70 V4 (TP-Link Systems Inc.) Fixed in 2.4.3 Build 20260902 rel.4511
Fix · CNA Kasa EC71 V4 (TP-Link Systems Inc.) Fixed in 2.4.3 Build 20260902 rel.4511

Timeline

2026-10-02 Threatist record created from CVE-2026-102370
2026-10-03 Alias added: GHSA-6p9x-mrgq-g8cr

References

Patch 2

Advisory 1

https://www.tp-link.com/us/support/faq/5324/

TI-2023-16571 TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain… KEVCVSS 3.1HIGH 8.8
TI-2023-01313 Command injection in TP-Link Archer AX21 KEVCVSS 3.1HIGH 8.8
TI-2020-14907 TP-Link TL-WA855RE V5 20200415-rel37464 devices allow an unauthenticated attacker (on the… KEVCVSS 3.1HIGH 8.8
TI-2025-08589 Authenticated RCE via Parental Control command injection KEVCVSS 4.0HIGH 8.6
TI-2015-02672 Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317… KEVCVSS 3.1HIGH 7.5
TI-2023-27456 Authentication bypass by spoofing in TP-Link TL-WR841N KEVCVSS 3.1MEDIUM 6.5

See all 636 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences