Authenticated code execution via unbounded sprintf
Published Jul 6, 2023 · Updated Nov 4, 2025
Stack-based buffer overflow in Milesight UR32L v32.3.0.5 allows remote authenticated users to execute arbitrary code via an HTTP request. In handle_interface_acl, an unbounded sprintf copies the interface JSON value into vtysh_command_buffer when out_acl is -1. High-privileged access to the management endpoint is required, and the published proof of concept crashes the affected process.
Summary
What happened
Stack-based buffer overflow in Milesight UR32L v32.3.0.5 allows remote authenticated users to execute arbitrary code via an HTTP request. In handle_interface_acl, an unbounded sprintf copies the interface JSON value into vtysh_command_buffer when out_acl is -1. High-privileged access to the management endpoint is required, and the published proof of concept crashes the affected process.
The record
- CVE
- CVE-2023-25091
- Published
- Jul 6, 2023
- Updated
- Nov 4, 2025
- Vendor
- Milesight
- Product
- UR32L
- Classifications
- CWE-121, CWE-787, T1190
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jul 6, 2023CVE publishedPublication date reported by the CVE source.
- Nov 4, 2025Record 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=v32.3.0.5
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
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Cisco Talos authenticated HTTP crash proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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