EUVD-2026-67936
GHSA-wg9w-9v33-74xx
Severity by source
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
Adjacent-only vector (AV:A) because LAN presence is required; no credentials needed (PR:N); only the UPnP service crashes with no confidentiality or integrity impact (A:L, C:N, I:N).
Primary rating from Vendor (TPLink).
CVSS VectorVendor: TPLink
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
Lifecycle Timeline
2DescriptionCVE.org
A NULL pointer dereference vulnerability exists in TL-WR841N v14 in the UPnP service when processing SOAP state variable query requests. A specially crafted SOAP query may trigger unexpected termination or instability of the process hosting the UPnP service.
Successful exploitation may result in a denial-of-service condition affecting UPnP discovery, state query, or related management functionality until the affected process is restarted or the device is rebooted.
AnalysisAI
NULL pointer dereference in TP-Link TL-WR841N v14's UPnP service allows adjacent-network attackers to crash the UPnP process by sending a specially crafted SOAP state variable query, resulting in a denial-of-service condition. The affected UPnP functionality - including device discovery and state management - remains unavailable until the process is restarted or the device is rebooted. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be on an adjacent network - the same LAN segment, local Wi-Fi broadcast domain, or otherwise directly layer-2 adjacent to the device (CVSS AV:A). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N) scores 5.3, reflecting an adjacent-network attack requiring no privileges and producing only low availability impact confined to the vulnerable system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | TP-Link has confirmed a patch is available and updated firmware for the TL-WR841N v14 can be downloaded from the official firmware page at https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware (US) or https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware (international), with the advisory at https://www.tp-link.com/us/support/faq/5270/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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More in Tl Wr841n V14
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An out-of-bounds read vulnerability in the UPnP service of TP-Link TL-WR841N v14 routers enables adjacent network attack
Memory corruption in the TP-Link TL-WR841N v14 embedded HTTP service allows an unauthenticated attacker with adjacent ne
NULL pointer dereference in the UPnP SOAP request handler of the TP-Link TL-WR841N v14 allows an adjacent-network attack
Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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