01 Record
CVE-2026-12339
Authenticated Arbitrary File Write Vulnerability in multiple devices
MediumPUBLISHEDCNA: TPLink
CNA base score6.9 CVSS v4.0CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
02 Description
Authenticated Arbitrary File Write Vulnerability in multiple devices
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.52% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 44.2% of scored records. A rank, not a probability.
- NVD base score
- 6.9 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS 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/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
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-10-23.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-10 18:20Z2 MO AGO
- Last updated
- 2026-08-25 20:54Z2 MO AGO
- Reserved
- 2026-06-15
- Assigning CNA
- TPLink
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.9)
- CNA CVSS 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
- Weaknesses
- CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base
- Data version
- 5.2
- Document digest
- b04d5c38e800649fa6b244a12f9d6e05d3a773ab306b535c1476106da975d5fd
05 Affected products
VendorProductVersionsPlatforms
TP-Link Systems Inc.TL-MR100 v3.200 to < (EU)_1.3.0 0.9.1 v0001.0 Build 260609 Rel.49957n, 0 to < 1.1.0 0.9.1 v0001.0 Build 260609 Rel35479n, Customized Software for South Korea KT, 0 to < 1.2.0 0.9.1 v0001.0 Build 260609 Rel.36250n, Customized Software for South Korea Telenor—
06 References
- www.tp-link.comhttps://www.tp-link.com/en/support/download/tl-mr6400/v5.30/#Firmware
- www.tp-link.comhttps://www.tp-link.com/en/support/download/archer-mr600/v2/#Firmware
- www.tp-link.comhttps://www.tp-link.com/en/support/download/archer-mr200/v7/#Firmware
- www.tp-link.comhttps://www.tp-link.com/en/support/faq/5237/
- www.tp-link.comhttps://www.tp-link.com/en/support/download/tl-mr100/v3.20/#Firmware
- www.tp-link.comhttps://www.tp-link.com/en/support/download/tl-mr150/v3.20/#Firmware
- www.tp-link.comhttps://www.tp-link.com/en/support/download/tl-mr6400/v8/#Firmware
- www.tp-link.comhttps://www.tp-link.com/kr/support/download/tl-mr100/v3.20/#Firmware