EUVD-2026-18428Severity by source
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 NVD · only source for this CVE.
CVSS VectorNVD
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
Lifecycle Timeline
4DescriptionCVE.org
A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP parsing loop when appending segmented request bodies without continuous write‑boundary verification, due to insufficient boundary validation when handling externally supplied HTTP input. An attacker on the same network segment could trigger heap memory corruption conditions by sending crafted payloads that cause write operations beyond allocated buffer boundaries. Successful exploitation causes a Denial-of-Service (DoS) condition, causing the device’s process to crash or become unresponsive.
AnalysisAI
Heap-based buffer overflow in TP-Link Tapo C520WS v2.6 allows unauthenticated network attackers to trigger denial-of-service by sending crafted HTTP payloads that bypass boundary validation during segmented request body parsing. The vulnerability exploits insufficient write-boundary verification in the HTTP parsing loop, causing heap memory corruption that crashes or hangs the device process. Patch is available from the vendor.
Technical ContextAI
The vulnerability resides in the HTTP request parsing component of the Tapo C520WS camera firmware (v2.6), specifically in the handler responsible for assembling multi-part or segmented HTTP request bodies. The root cause is CWE-122 (Heap-based Buffer Overflow), which occurs when the parser fails to continuously validate write boundaries as it appends external input to a heap-allocated buffer. Attackers can supply crafted payloads with improperly formatted or oversized segment data that causes the append operation to write beyond the allocated buffer's boundaries. The absence of persistent boundary checks between successive segment writes creates a classic heap overflow condition where attacker-controlled data overwrites adjacent heap structures, leading to memory corruption and process instability.
RemediationAI
Vendor-released patch is available per TP-Link advisory. Users should immediately check the Tapo C520WS firmware release notes and support pages (https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes) to identify and download the patched firmware version that addresses CVE-2026-34119. Perform a firmware update via the Tapo app or device web interface to move to a version beyond v2.6 that includes the heap overflow fix. As a temporary mitigation for devices that cannot be patched immediately, restrict network access to the camera using firewall rules or network segmentation to limit exposure to attackers on the same network segment; however, this is not a substitute for patching and should only be used as a short-term measure while patches are being staged.
Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317, C7 (2.0) with firmware before
cgi-bin/admin/servetest in TP-Link IP Cameras TL-SC3130, TL-SC3130G, TL-SC3171, TL-SC3171G, and possibly other models be
The PING function on the TP-Link TL-WR840N EU v5 router with firmware through TL-WR840N(EU)_V5_171211 is vulnerable to r
TP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain a command injection vulnerability via the component oal_set
Stack-based buffer overflow in the run_init_sbus function in the KCodes NetUSB module for the Linux kernel, as used in c
Directory traversal vulnerability in the web-based management feature on the TP-LINK TL-WR841N router with firmware 3.13
TP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain a command injection vulnerability via the component oal_sta
TP-Link Archer C7 and TL-WR841N routers contain an authenticated remote command execution vulnerability in the Parental
A vulnerability in the TP-Link Archer c20 router with firmware version V6.6_230412 and earlier permits unauthorized indi
Multiple stack-based buffer overflows in TP-Link WR940N WiFi routers with hardware version 4 allow remote authenticated
TP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain a remote code execution (RCE) vulnerability via the functio
In TP-Link Router AX50 firmware 210730 and older, import of a malicious backup file via web interface can lead to remote
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today