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Fencer Vulns
medium 6.5

CVE-2026-34118 json

Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in multiple TP-Link Tapo Cameras

published 2026-04-02 7 mo ago modified 2026-11-02 6 d ago also EUVD-2026-18426

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

A heap-based buffer overflow vulnerability was identified in multiple TP-Link Tapo cameras 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 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.

Patch / fix

  • TP-Link Systems Inc. Tapo C520WS v2.6 1.2.4 Build 260326 Rel.24666n
  • TP Link Systems Inc. Tapo C100 v5 1.5.4 Build 260528 Rel.11462n
  • TP Link Systems Inc. Tapo C101 v5 1.5.4 Build 260528 Rel.11462n
  • TP Link Systems Inc. Tapo C210 v3 V3.6_1.2.7 Build 260818
  • TP Link Systems Inc. Tapo TC70 v3 1.9.2 Build 261009 Rel.61408n
  • TP Link Systems Inc. Tapo C200 v3 1.9.2 Build 261009 Rel.61408n

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.1 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
CNA 4.0 7.1 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
NVD 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • TP-Link Systems Inc. Tapo C520WS v2.6
  • TP Link Systems Inc. Tapo C100 v5
  • TP Link Systems Inc. Tapo C101 v5
  • TP Link Systems Inc. Tapo C210 v3
  • TP Link Systems Inc. Tapo TC70 v3
  • TP Link Systems Inc. Tapo C200 v3

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.