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TI-2026-12889 Aliases CVE-2026-15315GHSA-xw5g-644p-8357

Unauthenticated Administrative Authentication Bypass via device_confirm Replay in TP-Link Tapo C120 and C200

Priority MEDIUM 40CWE-287Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

Tapo C120 v1 and C200 v5 contain an improper authentication vulnerability within the login authentication verification module. An attacker on the local network can exploit weaknesses in challenge parameter validation to bypass normal authentication controls and obtain administrative session tokens. Successful exploitation may allow an attacker to subsequently execute privileged management actions, enable unauthorized administrative access and temporary disruption of device services, resulting in a denial-of-service (DoS) condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00462 40th percentileScored 2026-11-07
Fix Fixed Tapo C200 v5 (TP-Link Systems Inc.): V5_1.4.6 Build 260709 Rel.27675nTapo C120 v1 (TP-Link Systems Inc): 1.9.3 Build 260521

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 C200 v5before V5_1.4.6 Build 260709 Rel.27675nV5_1.4.6 Build 260709 Rel.27675nPatch availableCNA
TP-LinkTapo C120 v1before 1.9.3 Build 2605211.9.3 Build 260521Patch availableCNA
  • Tapo C200 v5 VendorTP-Link Affected before V5_1.4.6 Build 260709 Rel.27675n Fixed in V5_1.4.6 Build 260709 Rel.27675n Patch available CNA
  • Tapo C120 v1 VendorTP-Link Affected before 1.9.3 Build 260521 Fixed in 1.9.3 Build 260521 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:tp-link:tapo_c120_firmware:*:*:*:*:*:*:*:*before 1.9.3VulnerableTP-Link
cpe:2.3:h:tp-link:tapo_c120:-:*:*:*:*:*:*:*not specified by NVDRunning onTP-Link
cpe:2.3:o:tp-link:tapo_c200_firmware:*:*:*:*:*:*:*:*before 1.4.6VulnerableTP-Link
cpe:2.3:h:tp-link:tapo_c200:5.0:*:*:*:*:*:*:*5.0Running onTP-Link
  • cpe:2.3:o:tp-link:tapo_c120_firmware:*:*:*:*:*:*:*:* Versions before 1.9.3 Vulnerable ·TP-Link
  • cpe:2.3:h:tp-link:tapo_c120:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TP-Link
  • cpe:2.3:o:tp-link:tapo_c200_firmware:*:*:*:*:*:*:*:* Versions before 1.4.6 Vulnerable ·TP-Link
  • cpe:2.3:h:tp-link:tapo_c200:5.0:*:*:*:*:*:*:* Versions 5.0 Running on ·TP-Link

Remediation

  • Fix · CNA Tapo C200 v5 (TP-Link Systems Inc.) Fixed in V5_1.4.6 Build 260709 Rel.27675n
  • Fix · CNA Tapo C120 v1 (TP-Link Systems Inc) Fixed in 1.9.3 Build 260521

Fixed in the same release

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

  • Advisory ·

    TP-Link Systems Tapo C200 v5 — tp-link.com/us/support/faq/5248

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-12890 Denial-of-Service via Oversized Encrypted Credential Input in TP-Link Tapo C200Priority LOW 31
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-15315
  2. 2026-10-03 Alias added: GHSA-xw5g-644p-8357
  3. 2026-10-25 Priority changed: LOW → MEDIUM

References

Patch 5

Sources

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