Is there a patch available for CVE-2026-34122?

Yes, a patch is available for CVE-2026-34122. Update the affected software to the latest version immediately.

Tapo C520Ws V2 6 CVE-2026-34122

Q: What is the CVSS score of CVE-2026-34122?

CVE-2026-34122 has a CVSS 4.0 base score of 7.1 (High). CVSS vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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. EPSS exploitation probability: 0.0%.

EUVD-2026-18434 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-04-02 TPLink

GHSA-hx8v-fm8j-mj2j

TP-Link Buffer Overflow Stack Overflow Tapo C520Ws V2 6

7.1

CVSS 4.0 · Vendor: TPLink

Severity by source

Vendor (TPLink) PRIMARY

7.1 HIGH

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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

Primary rating from Vendor (TPLink) · only source for this CVE.

CVSS VectorVendor: TPLink

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

EUVD ID Assigned

Apr 02, 2026 - 17:30 euvd

EUVD-2026-18434

Analysis Generated

Apr 02, 2026 - 17:30 vuln.today

Patch released

Apr 02, 2026 - 17:30 nvd

Patch available

CVE Published

Apr 02, 2026 - 17:20 nvd

HIGH 7.1

DescriptionCVE.org

A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation. An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow.

Successful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.

AnalysisAI

Stack-based buffer overflow in TP-Link Tapo C520WS v2.6 allows remote attackers to trigger denial-of-service by sending oversized configuration parameters to a vulnerable configuration handling component. Successful exploitation causes device crash or reboot, impacting camera availability. Vendor has released a patch.

Technical ContextAI

The vulnerability exists in a configuration handling component of the Tapo C520WS IP camera firmware (v2.6) and stems from insufficient input validation on configuration parameters processed on the stack (CWE-121: Stack-based Buffer Overflow). When an attacker supplies an excessively long value for a vulnerable parameter, the overflow corrupts the stack, leading to uncontrolled program flow termination or device reboot. The affected product is identified by CPE cpe:2.3:a:tp-link_systems_inc.:tapo_c520ws_v2.6:*:*:*:*:*:*:*:*, indicating the Tapo C520WS v2.6 firmware line from TP-Link Systems Inc.

RemediationAI

Upgrade TP-Link Tapo C520WS v2.6 firmware to the patched version released by TP-Link. Firmware updates are available from the vendor's official support pages at https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes and the corresponding international support page. Detailed patch information and FAQ regarding the vulnerability is available at https://www.tp-link.com/us/support/faq/5047/. Users should download the latest firmware from these official channels and apply the update through the camera's web interface or companion application to restore security.