CVE-2026-12339
Medium
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.
SeverityMedium
CVSS6.9
Exploit probability—
ProductTL-MR6400 v5.3
PublishedAug 10, 2026
First seenAug 10, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- TP-Link Systems Inc. TL-MR6400 v5.3(EU)_1.10.0 0.9.1 v0001.0 Build 260613 RC.76099n or later
- TP-Link Systems Inc. Archer MR600 v2(EU)_1.10.0 0.9.1 v0001.0 Build 260618 RC.40417n or later
- TP-Link Systems Inc. Archer MR200 v7(EU)_1.3.0 0.9.1 v0001.0 Build 260605 Rel.57870n or later
- TP-Link Systems Inc. TL-MR6400 v8.0(EU)_1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n or later
- TP-Link Systems Inc. TL-MR150 v3.20(EU)_1.3.0 0.9.1 v0001.0 Build 260720 Rel.59727n or later
- TP-Link Systems Inc. TL-MR100 v3.20(EU)_1.3.0 0.9.1 v0001.0 Build 260609 Rel.49957n, 1.1.0 0.9.1 v0001.0 Build 260609 Rel35479n, Customized Software for South Korea KT, 1.2.0 0.9.1 v0001.0 Build 260609 Rel.36250n, Customized Software for South Korea Telenor or later
Patches
- tp-link.com/en/support/download/tl-mr6400/v5.30/#Firmware
- tp-link.com/en/support/download/archer-mr600/v2/#Firmware
- tp-link.com/en/support/download/archer-mr200/v7/#Firmware
- tp-link.com/en/support/download/tl-mr100/v3.20/#Firmware
- tp-link.com/en/support/download/tl-mr150/v3.20/#Firmware
- tp-link.com/en/support/download/tl-mr6400/v8/#Firmware
- tp-link.com/kr/support/download/tl-mr100/v3.20/#Firmware
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| TP-Link Systems Inc. TL-MR6400 v5.3 | v < (EU)_1.10.0 0.9.1 v0001.0 Build 260613 RC.76099n | (EU)_1.10.0 0.9.1 v0001.0 Build 260613 RC.76099n |
| TP-Link Systems Inc. Archer MR600 v2 | v < (EU)_1.10.0 0.9.1 v0001.0 Build 260618 RC.40417n | (EU)_1.10.0 0.9.1 v0001.0 Build 260618 RC.40417n |
| TP-Link Systems Inc. Archer MR200 v7 | v < (EU)_1.3.0 0.9.1 v0001.0 Build 260605 Rel.57870n | (EU)_1.3.0 0.9.1 v0001.0 Build 260605 Rel.57870n |
| TP-Link Systems Inc. TL-MR6400 v8.0 | v < (EU)_1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n | (EU)_1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n |
| TP-Link Systems Inc. TL-MR150 v3.20 | v < (EU)_1.3.0 0.9.1 v0001.0 Build 260720 Rel.59727n | (EU)_1.3.0 0.9.1 v0001.0 Build 260720 Rel.59727n |
| TP-Link Systems Inc. TL-MR100 v3.20 | v < (EU)_1.3.0 0.9.1 v0001.0 Build 260609 Rel.49957n, v < 1.1.0 0.9.1 v0001.0 Build 260609 Rel35479n, Customized Software for South Korea KT, v < 1.2.0 0.9.1 v0001.0 Build 260609 Rel.36250n, Customized Software for South Korea Telenor | (EU)_1.3.0 0.9.1 v0001.0 Build 260609 Rel.49957n, 1.1.0 0.9.1 v0001.0 Build 260609 Rel35479n, Customized Software for South Korea KT, 1.2.0 0.9.1 v0001.0 Build 260609 Rel.36250n, Customized Software for South Korea Telenor |
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