CRITICALCVSS v3.1 9.8Vulnerability
CVE-2026-111711
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.
Properties
- Severity
- CRITICAL
- Nvd fetched at
- 2026-10-20T21:14:08.448323+00:00
- Epss score
- 0.00492
- Cvss score
- 9.8
- Cvss severity
- CRITICAL
- Retrieved at
- 2026-10-21T01:24:48+00:00
- Last source
- FIRST EPSS
- Score
- 9.8
- Cvss version
- 3.1
- Cve id
- CVE-2026-111711
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- First seen by Signal
- 2026-10-18T13:39:03+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published at
- 2026-10-16T18:17:55.337
- Last modified
- 2026-10-16T22:17:23.053
- Epss percentile
- 0.41027
Related Entities (1)
HAS_WEAKNESS (1)
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