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4 vulnerabilities by openNDS
CVE-2026-38822 (GCVE-0-2026-38822)
Vulnerability from cvelistv5 – Published: 2026-08-28 00:12 – Updated: 2026-08-28 15:23
VLAI
EPSS
VEX
Summary
In openNDS before 11.0.0, the client_params.sh script, invoked by the openNDS daemon to serve the authenticated client status page, is vulnerable to OS command injection through crafted HTTP GET query parameter keys. An authenticated captive portal user can inject arbitrary shell commands by embedding semicolons in a URL query parameter name.
Severity
7.6 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 15:17 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
mitre
CNA
References
1 reference
Impacted products
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CVE-2026-38821 (GCVE-0-2026-38821)
Vulnerability from cvelistv5 – Published: 2026-08-28 00:10 – Updated: 2026-08-28 15:24
VLAI
EPSS
VEX
Summary
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.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 15:23 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
mitre
CNA
References
1 reference
Impacted products
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CVE-2026-38820 (GCVE-0-2026-38820)
Vulnerability from cvelistv5 – Published: 2026-08-28 00:07 – Updated: 2026-08-28 16:20
VLAI
EPSS
VEX
Summary
openNDS before 11.0.0 is susceptible to unauthenticated OS command execution via shell command injection through the fas query parameter on the /opennds_preauth/ endpoint because of libopennds.sh.
Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 16:19 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
mitre
CNA
References
1 reference
Impacted products
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CVE-2026-38819 (GCVE-0-2026-38819)
Vulnerability from cvelistv5 – Published: 2026-08-28 00:03 – Updated: 2026-08-28 16:21
VLAI
EPSS
VEX
Summary
Multiple memory leaks in openNDS before 11.0.0 allow an unauthenticated attacker on the captive portal network to exhaust all available memory on the device within minutes.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 16:21 UTC
CWE
- CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
mitre
CNA
References
Impacted products
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