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CVE-2026-34124

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

Published: Apr 2, 2026Updated: Apr 6, 2026 Sources: CVE List NVDCWE-120
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.3%
Top 79.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-120

Affected Products

Tapo C520WS v2.6TP-Link Systems Inc.Networking Infrastructure
tapo c520ws firmwaretp-linkNetworking Infrastructure
tp-link systems inc.commercialCNNetworking Infrastructureaka tp-link
tp-linkcommercialTWNetworking Infrastructureaka tp-link, tp link

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes
tp-link.com
https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes
tp-link.com
https://www.tp-link.com/us/support/faq/5047/
tp-link.com

Timeline

Published
Apr 2, 2026
Last Updated
Apr 6, 2026

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