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Vulnerability record · CVE-2026-0918 · published 27 January 2026

CVE-2026-0918: Tp-link tapo c220 firmware null pointer dereference vulnerability

Tp Link · Tapo C220 Firmware

The Tapo C100 v5, C220 v1 and C520WS v2 cameras’ HTTP service does not safely handle POST requests containing an excessively large Content-Length header. The resulting failed memory allocation triggers a NULL pointer dereference, causing the main service process to crash. An unauthenticated attacker can repeatedly crash the service, causing temporary denial of service. The device restarts automatically, and repeated requests can keep it unavailable.

7.1 CVSS 4.0 High EPSS 0.73% · top 47.5% CWE-476 · NULL pointer dereference
7.1CVSS 4.0 base score
0.73%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

Description

The Tapo C100 v5, C220 v1 and C520WS v2 cameras’ HTTP service does not safely handle POST requests containing an excessively large Content-Length header. The resulting failed memory allocation triggers a NULL pointer dereference, causing the main service process to crash. An unauthenticated attacker can repeatedly crash the service, causing temporary denial of service. The device restarts automatically, and repeated requests can keep it unavailable.

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:

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.crac-learning.com/post/smart-home-security-research-cve-2026-0918-assigned
https://www.tp-link.com/en/support/download/tapo-c220/v1/ Product
https://www.tp-link.com/en/support/download/tapo-c520ws/v2/ Product
https://www.tp-link.com/us/support/download/tapo-c100/v5/ Product
https://www.tp-link.com/us/support/download/tapo-c220/v1.60/ Product
https://www.tp-link.com/us/support/download/tapo-c520ws/v2/ Product
https://www.tp-link.com/us/support/faq/4923/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2026-34121Tp-link tapo c520ws firmware improper authentication vulnerabilityAn authentication bypass vulnerability within the HTTP handling of the DS configuration service in TP-Link Tapo C520WS v2.6 was identified, due to in…EPSS 0.48%7.1CVE-2026-8714Tp-link tapo c520ws firmware improper input validation vulnerabilityA denial-of-service vulnerability exists in the RTSP server component of TP-Link Tapo C520WS v2 due to improper handling of syntactically invalid inp…EPSS 0.33%7.1CVE-2026-34122Tp-link tapo c520ws firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient …EPSS 0.36%7.1CVE-2026-34124Tp-link tapo c520ws firmware classic buffer overflow vulnerabilityA denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path parsing logic. The implementation enforces …EPSS 0.43%7.1CVE-2026-34118Tp-link tapo c520ws firmware heap-based buffer overflow vulnerabilityA heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C520WS v2.6 in the HTTP POST body parsing logic due to missin…EPSS 0.52%7.1CVE-2026-34119Tp-link tapo c520ws firmware heap-based buffer overflow vulnerabilityA heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP parsing loop when appending segmented request b…EPSS 0.36%7.1CVE-2026-34120Tp-link tapo c520ws firmware heap-based buffer overflow vulnerabilityA heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the asynchronous parsing of local video stream content d…EPSS 0.36%7.1CVE-2026-0919Tp-link tapo c220 firmware improper input validation vulnerabilityThe HTTP parser of Tapo C210 v3, C220 v1 and C520WS v2 cameras improperly handles requests containing an excessively long URL path. An invalid‑URL er…EPSS 0.60%

Source: NIST National Vulnerability Database (record CVE-2026-0918), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.