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CVE-2026-34122

Stack-based Buffer Overflow Leading to Denial of Service in TP-Link Tapo C520WS

Published: Apr 2, 2026Updated: Apr 6, 2026 Sources: CVE List NVDCWE-121
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.3%
Top 83.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation. An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow. Successful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.

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-121

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

1 technique
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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