Netcore NR256CN through 1.5.140116 contains a pre-authentication stack overflow vulnerability in the Boa web server's user_ok() function, which copies Basic-auth usernames with unbounded strcpy() calls into 64-byte stack buffers. Unauthenticated attackers can send a username longer than 63 bytes to any protected /router/*.cgi route to crash the main Boa process or potentially execute code.
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Affected Vendors & Products
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Fixes
Solution
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Workaround
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References
History
Fri, 16 Oct 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Netcore NR256CN through 1.5.140116 contains a pre-authentication stack overflow vulnerability in the Boa web server's user_ok() function, which copies Basic-auth usernames with unbounded strcpy() calls into 64-byte stack buffers. Unauthenticated attackers can send a username longer than 63 bytes to any protected /router/*.cgi route to crash the main Boa process or potentially execute code. | |
| Title | Netcore NR256CN through 1.5.140116 Pre-Auth Stack Overflow via Boa user_ok() | |
| Weaknesses | CWE-121 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-16T21:16:42.070Z
Reserved: 2026-10-16T14:31:23.221Z
Link: CVE-2026-111711
No data.
Status : Deferred
Published: 2026-10-16T18:17:55.337
Modified: 2026-10-16T19:03:18.127
Link: CVE-2026-111711
No data.
OpenCVE Enrichment
Updated: 2026-10-16T19:00:11Z
Weaknesses