CVE-2026-1871

Authenticated Stack-based Buffer Overflow in RTSP Authentication of Tapo C200

MEDIUM
6.5
CVSS Score
Published: June 2, 2026 at 04:13 PM UTC
Updated: July 22, 2026 at 07:24 PM UTC
2 products affected across 1 vendorTapo C200 FirmwareTapo C200

Using Tapo C200 v5 by TP-Link Systems Inc.?

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

TP-Link Tapo C200 v5 contains a stack-based buffer overflow flaw in RTSP authentication handling due to improper validation of Authorization header field lengths, which can be triggered by a crafted authentication request. Successful exploitation causes the affected RTSP core service process to crash and triggers an automatic system reboot, resulting in a denial of service (DoS) condition. This prevents legitimate users from accessing the camera’s live video stream or management interface until the service restarts.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.4.4 Build 260527 Rel.28339n
Affected range stops below 1.4.4 Build 260527 Rel.28339n, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-121

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