CVE-2026-38821
HIGH
7.1
CVSS Score
Published: August 28, 2026 at 12:10 AM UTC
Updated: September 9, 2026 at 05:27 PM UTC
1 product affected across 1 vendorOpennds
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Severity
HIGH7.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (1)
SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.1HIGHmitre
- Attack Vector
- ADJACENT_NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- LOW
Vector?
Quick Info
StatusDEFERRED
CWE
CWE-122
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