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Vulnerability · Published Aug 10, 2026 · Assigned by TPLink

CVE-2026-12339Authenticated Arbitrary File Write Vulnerability in multiple devices

Medium 6.9

In plain English

A medium-severity path traversal in Archer MR200 v7 from TP-Link Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 4.0)6.9Medium
Exploit odds (30 days)0.5%top 55.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system.Successful exploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability.

Affected products (as reported)

VendorProductVersions
TP-Link Systems Inc. TL-MR6400 v5.3 0 – before (EU)_1.10.0 0.9.1 v0001.0 Build 260613 RC.76099n
TP-Link Systems Inc. Archer MR600 v2 0 – before (EU)_1.10.0 0.9.1 v0001.0 Build 260618 RC.40417n
TP-Link Systems Inc. Archer MR200 v7 0 – before (EU)_1.3.0 0.9.1 v0001.0 Build 260605 Rel.57870n
TP-Link Systems Inc. TL-MR6400 v8.0 0 – before (EU)_1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n
TP-Link Systems Inc. TL-MR150 v3.20 0 – before (EU)_1.3.0 0.9.1 v0001.0 Build 260720 Rel.59727n
TP-Link Systems Inc. TL-MR100 v3.20 0 – before (EU)_1.3.0 0.9.1 v0001.0 Build 260609 Rel.49957n0 – before 1.1.0 0.9.1 v0001.0 Build 260609 Rel35479n,  Customized Software for South Korea KT0 – before 1.2.0 0.9.1 v0001.0 Build 260609 Rel.36250n, Customized Software for South Korea Telenor

Weakness: CWE-22 · Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

References