CVE record · CVE-2026-12339

Authenticated Arbitrary File Write Vulnerability in multiple devices

CVSS 6.9 MediumEPSS 0.0053 · 45th percentile

Published by the CVE Program (CNA: TPLink) at 10 Aug 2026, 18:20 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
TP-Link Systems Inc.	TL-MR6400 v5.3	affected before (EU)_1.10.0 0.9.1 v0001.0 Build 260613 RC.76099n custom Other versions: unaffected
TP-Link Systems Inc.	Archer MR600 v2	affected before (EU)_1.10.0 0.9.1 v0001.0 Build 260618 RC.40417n custom Other versions: unaffected
TP-Link Systems Inc.	Archer MR200 v7	affected before (EU)_1.3.0 0.9.1 v0001.0 Build 260605 Rel.57870n custom Other versions: unaffected
TP-Link Systems Inc.	TL-MR6400 v8.0	affected before (EU)_1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n custom Other versions: unaffected
TP-Link Systems Inc.	TL-MR150 v3.20	affected before (EU)_1.3.0 0.9.1 v0001.0 Build 260720 Rel.59727n custom Other versions: unaffected
TP-Link Systems Inc.	TL-MR100 v3.20	affected before (EU)_1.3.0 0.9.1 v0001.0 Build 260609 Rel.49957n custom affected before 1.1.0 0.9.1 v0001.0 Build 260609 Rel35479n, Customized Software for South Korea KT custom affected before 1.2.0 0.9.1 v0001.0 Build 260609 Rel.36250n, Customized Software for South Korea Telenor custom Other versions: unaffected

Identifiers: CVE-2026-12339
CNA: TPLink
Weakness (CWE): CWE-22
Tags: TP-Link Systems Inc. TL-MR6400 v5.3
TP-Link Systems Inc. Archer MR600 v2
TP-Link Systems Inc. Archer MR200 v7
TP-Link Systems Inc. TL-MR6400 v8.0
TP-Link Systems Inc. TL-MR150 v3.20
TP-Link Systems Inc. TL-MR100 v3.20
Path traversal
Published: 10 Aug 2026
Updated: 25 Aug 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.9	Medium	4.0	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	CNA (TPLink)

CISA KEV Not listed.
EPSS 0.0053, the 45th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 10 Aug 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.