Authenticated code execution via netClientSetWlanCfg buffer overflows
Published Aug 1, 2023 · Updated Jul 9, 2026
Stack buffer overflows in affected EZVIZ camera firmware allow remote authenticated users on the local network to execute code. The netClientSetWlanCfg function performs two out-of-bounds writes while processing crafted wireless-configuration input. Valid device credentials and local-network access are required; successful exploitation grants code execution on the camera and can alter its video stream.
Summary
What happened
Stack buffer overflows in affected EZVIZ camera firmware allow remote authenticated users on the local network to execute code. The netClientSetWlanCfg function performs two out-of-bounds writes while processing crafted wireless-configuration input. Valid device credentials and local-network access are required; successful exploitation grants code execution on the camera and can alter its video stream.
The record
- CVE
- CVE-2023-34551
- Published
- Aug 1, 2023
- Updated
- Jul 9, 2026
- Vendor
- Hangzhou EZVIZ Network Co., Ltd.
- Product
- EZVIZ CS-CV248-A0-32WMFR Firmware
- Classifications
- CWE-787, T1210
- Attack vector
- adjacent
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 1, 2023CVE publishedPublication date reported by the CVE source.
- Jul 9, 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 <5.2.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
- infobyte/ezviz_lan_rcefunctional · demonstrated
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Technologies
Your stack
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Your stack
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