CVE-2026-0919

Unauthenticated Denial of Service via Oversized URL in HTTP Parser on TP-Link Tapo C210, C220 & C520WS

HIGH
7.5
CVSS Score
Published: January 27, 2026 at 05:52 PM UTC
Updated: June 17, 2026 at 10:11 AM UTC
5 products affected across 1 vendorTapo C520WS FirmwareTapo C220 FirmwareTapo C520WS

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

The HTTP parser of Tapo C220 v1 and C520WS v2 cameras improperly handles requests containing an excessively long URL path. An invalid‑URL error path continues into cleanup code that assumes allocated buffers exist, leading to a crash and service restart. An unauthenticated attacker can force repeated service crashes or device reboots, causing denial of service.

Affected

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

v < 1.4.2
tp-link-tapo-c220 (same device)
v < 1.2.3
tp-link-tapo-c520ws (same device)
v < 1.2.6 Build 260328
Affected range stops below 1.2.6 Build 260328, so it looks safe — our inference, not a vendor statement
v < 1.4.2 Build 251112
Affected range stops below 1.4.2 Build 251112, so it looks safe — our inference, not a vendor statement
v < 1.2.3 Build 251114
Affected range stops below 1.2.3 Build 251114, 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
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20NVD-CWE-noinfo

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