Adjacent-network denial of service via stream parsing
Published Apr 2, 2026 · Updated Apr 2, 2026
Heap-based buffer overflow in TP-Link Tapo C520WS v2.6 firmware allows remote attackers to crash the camera service via local streaming input. Its asynchronous local-video parser writes crafted streaming data beyond an allocated heap buffer after insufficient alignment and boundary validation. Access from the same network segment is required, and successful exploitation crashes the device process or leaves it unresponsive.
Summary
What happened
Heap-based buffer overflow in TP-Link Tapo C520WS v2.6 firmware allows remote attackers to crash the camera service via local streaming input. Its asynchronous local-video parser writes crafted streaming data beyond an allocated heap buffer after insufficient alignment and boundary validation. Access from the same network segment is required, and successful exploitation crashes the device process or leaves it unresponsive.
The record
- CVE
- CVE-2026-34120
- Published
- Apr 2, 2026
- Updated
- Apr 2, 2026
- Vendor
- TP-Link Systems Inc.
- Product
- Tapo C520WS
- Classifications
- CWE-122, T1499
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 2, 2026CVE publishedPublication date reported by the CVE source.
- Apr 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.2.4 Build 260326 Rel.24666n
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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