CVE-2026-12339
Authenticated Arbitrary File Write Vulnerability in multiple devices
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.
INFO
Published Date :
Aug. 10, 2026, 7:17 p.m.
Last Modified :
Aug. 26, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
f23511db-6c3e-4e32-a477-6aa17d310630
Affected Products
The following products are affected by CVE-2026-12339
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | f23511db-6c3e-4e32-a477-6aa17d310630 | ||||
| CVSS 4.0 | MEDIUM | f23511db-6c3e-4e32-a477-6aa17d310630 |
Solution
- Apply vendor patches for the ISP Upgrade functionality.
- Validate archive contents before extraction.
- Restrict administrator privileges where possible.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-12339.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-12339 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-12339
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-12339 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-12339 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by f23511db-6c3e-4e32-a477-6aa17d310630
Aug. 26, 2026
Action Type Old Value New Value Changed 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 overwrite on the underlying system, affecting system integrity and availability. 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. Added Reference https://www.tp-link.com/en/support/download/archer-mr200/v7/#Firmware Added Reference https://www.tp-link.com/en/support/download/archer-mr600/v2/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-mr100/v3.20/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-mr150/v3.20/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-mr6400/v5.30/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-mr6400/v8/#Firmware Added Reference https://www.tp-link.com/en/support/faq/5237/ Added Reference https://www.tp-link.com/kr/support/download/tl-mr100/v3.20/#Firmware Removed Reference https://www.tp-link.com/en/support/download/archer-mr200/v7/#Firmware Removed Reference https://www.tp-link.com/en/support/download/archer-mr600/v2/#Firmware Removed Reference https://www.tp-link.com/en/support/download/tl-mr100/v3.20/#Firmware Removed Reference https://www.tp-link.com/en/support/download/tl-mr150/v3.20/#Firmware Removed Reference https://www.tp-link.com/en/support/download/tl-mr6400/v5.30/#Firmware Removed Reference https://www.tp-link.com/en/support/download/tl-mr6400/v8/#Firmware Removed Reference https://www.tp-link.com/en/support/faq/5237/ Removed Reference https://www.tp-link.com/kr/support/download/tl-mr100/v3.20/#Firmware -
CVE Modified by f23511db-6c3e-4e32-a477-6aa17d310630
Aug. 25, 2026
Action Type Old Value New Value Added Reference https://www.tp-link.com/en/support/download/tl-mr100/v3.20/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-mr150/v3.20/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-mr6400/v8/#Firmware Added Reference https://www.tp-link.com/kr/support/download/tl-mr100/v3.20/#Firmware Changed Affected [{'vendor': 'TP-Link Systems Inc.', 'product': 'TL-MR6400 v5.3', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.10.0 0.9.1 v0001.0 Build 260613 RC.76099n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer MR600 v2', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.10.0 0.9.1 v0001.0 Build 260618 RC.40417n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer MR200 v7', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.3.0 0.9.1 v0001.0 Build 260605 Rel.57870n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] [{'vendor': 'TP-Link Systems Inc.', 'product': 'TL-MR6400 v5.3', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.10.0 0.9.1 v0001.0 Build 260613 RC.76099n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer MR600 v2', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.10.0 0.9.1 v0001.0 Build 260618 RC.40417n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer MR200 v7', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.3.0 0.9.1 v0001.0 Build 260605 Rel.57870n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'TL-MR6400 v8.0', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'TL-MR150 v3.20', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.3.0 0.9.1 v0001.0 Build 260720 Rel.59727n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'TL-MR100 v3.20', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.3.0 0.9.1 v0001.0 Build 260609 Rel.49957n', 'versionType': 'custom'}, {'status': 'affected', 'version': '0', 'lessThan': '1.1.0 0.9.1 v0001.0 Build 260609 Rel35479n, \xa0Customized Software for South Korea KT', 'versionType': 'custom'}, {'status': 'affected', 'version': '0', 'lessThan': '1.2.0 0.9.1 v0001.0 Build 260609 Rel.36250n, Customized Software for South Korea Telenor', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 11, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-12339', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-11T14:44:35.924185Z'} -
New CVE Received by f23511db-6c3e-4e32-a477-6aa17d310630
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'TP-Link Systems Inc.', 'product': 'TL-MR6400 v5.3', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.10.0 0.9.1 v0001.0 Build 260613 RC.76099n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer MR600 v2', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.10.0 0.9.1 v0001.0 Build 260618 RC.40417n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'TP-Link Systems Inc.', 'product': 'Archer MR200 v7', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(EU)_1.3.0 0.9.1 v0001.0 Build 260605 Rel.57870n', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] Added 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 overwrite on the underlying system, affecting system integrity and availability. Added CVSS V4.0 AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/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 Added CWE CWE-22 Added Reference https://www.tp-link.com/en/support/download/archer-mr200/v7/#Firmware Added Reference https://www.tp-link.com/en/support/download/archer-mr600/v2/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-mr6400/v5.30/#Firmware Added Reference https://www.tp-link.com/en/support/faq/5237/