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TI-2026-26440 Aliases CVE-2026-34118GHSA-v6p2-mjh5-mvpm

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

Priority LOW 32CWE-122Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00452 39th percentileScored 2026-11-07
Fix Fixed Tapo C520WS v2.6 (TP-Link Systems Inc.): 1.2.4 Build 260326 Rel.24666nTapo C100 v5 (TP Link Systems Inc.): 1.5.4 Build 260528 Rel.11462n+4 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TP-LinkTapo C520WS v2.6before 1.2.4 Build 260326 Rel.24666n1.2.4 Build 260326 Rel.24666nPatch availableCNA
TP-LinkTapo C100 v5before 1.5.4 Build 260528 Rel.11462n1.5.4 Build 260528 Rel.11462nPatch availableCNA
TP-LinkTapo C101 v5before 1.5.4 Build 260528 Rel.11462n1.5.4 Build 260528 Rel.11462nPatch availableCNA
TP-LinkTapo C210 v3before V3.6_1.2.7 Build 260818V3.6_1.2.7 Build 260818Patch availableCNA
TP-LinkTapo TC70 v3before 1.9.2 Build 261009 Rel.61408n1.9.2 Build 261009 Rel.61408nPatch availableCNA
TP-LinkTapo C200 v3before 1.9.2 Build 261009 Rel.61408n1.9.2 Build 261009 Rel.61408nPatch availableCNA
  • Tapo C520WS v2.6 VendorTP-Link Affected before 1.2.4 Build 260326 Rel.24666n Fixed in 1.2.4 Build 260326 Rel.24666n Patch available CNA
  • Tapo C100 v5 VendorTP-Link Affected before 1.5.4 Build 260528 Rel.11462n Fixed in 1.5.4 Build 260528 Rel.11462n Patch available CNA
  • Tapo C101 v5 VendorTP-Link Affected before 1.5.4 Build 260528 Rel.11462n Fixed in 1.5.4 Build 260528 Rel.11462n Patch available CNA
  • Tapo C210 v3 VendorTP-Link Affected before V3.6_1.2.7 Build 260818 Fixed in V3.6_1.2.7 Build 260818 Patch available CNA
  • Tapo TC70 v3 VendorTP-Link Affected before 1.9.2 Build 261009 Rel.61408n Fixed in 1.9.2 Build 261009 Rel.61408n Patch available CNA
  • Tapo C200 v3 VendorTP-Link Affected before 1.9.2 Build 261009 Rel.61408n Fixed in 1.9.2 Build 261009 Rel.61408n Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tp-link:tapo_c520ws_firmware:*:*:*:*:*:*:*:*before 1.2.4VulnerableTP-Link
cpe:2.3:h:tp-link:tapo_c520ws:2.6:*:*:*:*:*:*:*2.6Running onTP-Link
  • cpe:2.3:o:tp-link:tapo_c520ws_firmware:*:*:*:*:*:*:*:* Versions before 1.2.4 Vulnerable ·TP-Link
  • cpe:2.3:h:tp-link:tapo_c520ws:2.6:*:*:*:*:*:*:* Versions 2.6 Running on ·TP-Link

Remediation

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

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    TP-Link Systems Tapo C520WS v2.6 — tp-link.com/us/support/faq/5047

    6 records Highest priority Priority MEDIUM 1 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2026-26443 Authentication Bypass in DS Configuration Service via HTTP Request Parsing Differential of TP-Link Tapo C520WS and C210Priority MEDIUM 40
    • TI-2026-26446 Denial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WSPriority LOW 31
    • TI-2026-26444 Stack-based Buffer Overflow Leading to Denial of Service in TP-Link Tapo C520WSPriority LOW 31
    Show all 6 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34118
  2. 2026-10-03 Alias added: GHSA-v6p2-mjh5-mvpm
  3. 2026-10-19 Title updated · CNA
  4. 2026-10-19 Fix available: TP Link Systems Inc./Tapo C210 [email protected]_1.2.7 Build 260818 · CNA
  5. 2026-10-19 1 new reference · CNA
  6. 2026-11-02 Title updated · CNA
  7. 2026-11-02 Fix available: TP Link Systems Inc./Tapo C200 [email protected] Build 261009 Rel.61408n, TP Link Systems Inc./Tapo TC70 [email protected] Build 261009 Rel.61408n · CNA
  8. 2026-11-02 3 new references · CNA

References

Patch 9

Advisory 1

  • TI-2026-26443 Authentication Bypass in DS Configuration Service via HTTP Request Parsing Differential of TP-Link Tapo C520WS and C210 CVSS 4.0HIGH 8.7
  • TI-2026-01028 Unauthenticated Denial of Service via Firmware Update Endpoint on TP-Link Tapo C220 & C520WS CVSS 4.0HIGH 7.1
  • TI-2026-00695 Unauthenticated Denial of Service via Oversized URL in HTTP Parser on TP-Link Tapo C210, C220 & C520WS CVSS 4.0HIGH 7.1
  • TI-2026-00694 Null Pointer Dereference in Tapo SmartCam HTTP Service on TP-Link Tapo C220 & C520WS CVSS 4.0HIGH 7.1
  • TI-2026-26446 Denial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WS CVSS 4.0HIGH 7.1
  • TI-2026-26444 Stack-based Buffer Overflow Leading to Denial of Service in TP-Link Tapo C520WS CVSS 4.0HIGH 7.1
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences