A heap-based buffer overflow vulnerability exists in openNDS before 11.0.0 that allows an unauthenticated attacker on the captive portal network to crash the openNDS daemon (denial of service) and potentially achieve remote code execution. This is in http_microhttpd.c.
History

Fri, 28 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 28 Aug 2026 07:00:00 +0000

Type Values Removed Values Added
Title OpenNDS Buffer Overflow Enables Denial of Service and Remote Code Execution

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Description A heap-based buffer overflow vulnerability exists in openNDS before 11.0.0 that allows an unauthenticated attacker on the captive portal network to crash the openNDS daemon (denial of service) and potentially achieve remote code execution. This is in http_microhttpd.c.
First Time appeared Opennds
Opennds opennds
Weaknesses CWE-122
CPEs cpe:2.3:a:opennds:opennds:*:*:*:*:*:*:*:*
Vendors & Products Opennds
Opennds opennds
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-08-28T00:10:10.769Z

Updated: 2026-08-28T15:24:14.987Z

Reserved: 2026-04-06T10:01:05.608Z

Link: CVE-2026-38821

cve-icon Vulnrichment

Updated: 2026-08-28T15:24:08.603Z

cve-icon NVD

Status : Received

Published: 2026-08-28T02:16:21.490

Modified: 2026-08-28T20:17:28.440

Link: CVE-2026-38821

cve-icon Redhat

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