CVE-2026-34124

Denial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WS

MEDIUM
6.5
CVSS Score
Published: April 2, 2026 at 05:20 PM UTC
Updated: July 24, 2026 at 09:20 PM UTC
3 products affected across 1 vendorTapo C520WS FirmwareTapo C520WSLink Tapo C520WS

Using Tapo C520WS v2.6 by TP-Link Systems Inc.?

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

Description

A denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path parsing logic. The implementation enforces length restrictions on the raw request path but does not account for path expansion performed during normalization. An attacker on the adjacent network may send a crafted HTTP request to cause buffer overflow and memory corruption, leading to system interruption or device reboot.

Affected

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

v < 1.2.4
Affected range stops below 1.2.4, so it looks safe — our inference, not a vendor statement
tp-link-tapo-c520ws (same device)
v < 1.2.4 Build 260326 Rel.24666n
Affected range stops below 1.2.4 Build 260326 Rel.24666n, so it looks safe — our inference, not a vendor statement
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

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-120

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