CVE-2026-34118 Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C100, C101, C210 & C520WS

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C210 v3.6 and C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally...

CVE-2026-34118 Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C100, C101, C210 & C520WS

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C210 v3.6 and C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally...

CVE-2026-34118

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally supplied HTTP input. An...

PT-2026-29850

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,...

PT-2026-29849

A critical HTTP authentication bypass CVE-2026-34121 has been identified in TP-Link devices, potentially allowing unauthorized access. Technical Breakdown Vulnerability Type: Authentication Bypass Impact: Allows an attacker to circumvent HTTP authentication mechanisms on affected TP-Link devices,...

PT-2026-29847

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...

CVE-2026-34118: Heap-based Buffer Overflow

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C210 v3.6 and C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally...

PT-2026-29846

Name of the Vulnerable Software and Affected Versions TP-Link Tapo C100/C101 version 5 TP-Link Tapo C520WS version 2.6 Description A heap-based buffer overflow occurs in the HTTP POST body parsing logic due to insufficient boundary validation and missing validation of remaining buffer capacity...

CVE-2026-34122: Stack-based Buffer Overflow

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,...

CVE-2026-34124: Buffer Copy without Checking Size of Input

A denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path parsing logic. The implementation enforces length restrictions on the raw request path but does not account for path expansion performed during normalization. An attacker on the adjacent...

CVE-2026-34121: Improper Authentication

An authentication bypass vulnerability within the HTTP handling of the DS configuration service in TP-Link Tapo C520WS v2.6 was identified, due to inconsistent parsing and authorization logic in JSON requests during authentication check. An unauthenticated attacker can append an...

CVE-2026-34120: Heap-based Buffer Overflow

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the asynchronous parsing of local video stream content due to insufficient alignment and validation of buffer boundaries when processing streaming inputs.An attacker on the same network segment could...

CVE-2026-34119: Heap-based Buffer Overflow

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...

Telnet CLI Arbitrary Command Execution

The vulnerability of the Telnet command-line interface CLI of TP-Link’s TL-MR6400 v5.3 router software relates to the lack of measures taken to neutralize special elements used in operating system commands. Exploiting this vulnerability allows a remote attacker to execute arbitrary system command...

CVE-2021-27209

In the management interface on TP-Link Archer C5v 1.7181221 devices, credentials are sent in a base64 format over cleartext HTTP...

CVE-2021-27210

TP-Link Archer C5v 1.7181221 devices allows remote attackers to retrieve cleartext credentials via USERCFG0,0,0,0,0,00,0,0,0,0,00,0 to the /cgi?1&5 URI...

CVE-2026-3622

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. This...

TP-Link, Canva, HikVision vulnerabilities

Cisco Talos' Vulnerability Discovery & Research team recently disclosed a vulnerability in HikVision, as well as 10 in TP-Link, and 19 in Canva. The vulnerabilities mentioned in this blog post have been patched by their respective vendors, all in adherence to Cisco 's third-party vulnerability...

CVE-2025-15518

Improper input handling in a wireless-control administrative CLI command on TP-Link Archer NX200, NX210, NX500 and NX600 allows crafted input to be executed as part of an operating system command. An authenticated attacker with administrative privileges may execute arbitrary commands on the...

CVE-2025-15519

Improper input handling in a modem-management administrative CLI command on TP-Link Archer NX200, NX210, NX500 and NX600 allows crafted input to be executed as part of an operating system command. An authenticated attacker with administrative privileges may execute arbitrary commands on the...