openNDS vulnerabilities
We track 14 vulnerabilities in openNDS products across 2 products. 14 are rated high or critical, and none are known to be exploited. The most recent was published on August 28, 2026.
Latest openNDS vulnerabilities
- 7.6 High severity
openNDS: Improper Neutralization of Special Elements used in an OS Command
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 in
- 7.1 High severity
openNDS: Heap-based Buffer Overflow
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_micr
- 8.3 High severity
openNDS: Improper Neutralization of Special Elements used in an OS Command
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.
- 9.8 Critical severity
Opennds: Improper Neutralization of Special Elements used in an OS Command
An issue was discovered in OpenNDS before 10.1.3. It fails to sanitize the status path script entry in the configuration file, allowing attackers that have direct or indirect access to this file to execute arbitrary OS commands.
- 9.8 Critical severity
Opennds: Improper Neutralization of Special Elements used in an OS Command
An issue was discovered in OpenNDS before 10.1.3. It fails to sanitize the FAS key entry in the configuration file, allowing attackers that have direct or indirect access to this file to execute arbitrary OS commands.
- 9.8 Critical severity
Opennds: Improper Neutralization of Special Elements used in an OS Command
An issue was discovered in OpenNDS before 10.1.3. It fails to sanitize the gateway FQDN entry in the configuration file, allowing attackers that have direct or indirect access to this file to execute arbitrary OS commands.
- 9.8 Critical severity
Opennds: Improper Neutralization of Special Elements used in an OS Command
An issue was discovered in OpenNDS before 10.1.3. It fails to sanitize the network interface name entry in the configuration file, allowing attackers that have direct or indirect access to this file to execute arbitrary OS commands.
- 7.5 High severity
opennds: Missing Release of Memory after Effective Lifetime
An issue was discovered in the captive portal in OpenNDS before version 10.1.3. It has multiple memory leaks due to not freeing up allocated memory. This may lead to a Denial-of-Service condition due to the consumption of all available memory. Affected OpenNDS
- 9.8 Critical severity
Opennds: Out-of-bounds Write
An issue was discovered in the captive portal in OpenNDS before version 10.1.3. get_query in http_microhttpd.c does not validate the length of the query string of GET requests. This leads to a stack-based buffer overflow in versions 9.x and earlier, and to a h
- 7.5 High severity
Captive Portal: NULL Pointer Dereference
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a do_binauth NULL pointer dereference that be triggered with a crafted GET HTTP request with a missing User-Agent HTTP header. Triggering this issue results in crashing OpenNDS (a
- 7.5 High severity
Captive Portal: NULL Pointer Dereference
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a show_preauthpage NULL pointer dereference that can be triggered with a crafted GET HTTP with a missing User-Agent header. Triggering this issue results in crashing OpenNDS (a Den
- 9.8 Critical severity
Captive Portal: Improper Encoding or Escaping of Output
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. When the custom unescape callback is enabled, attackers can execute arbitrary OS commands by inserting them into the URL portion of HTTP GET requests. Affected OpenNDS Captive Portal befo
- 7.5 High severity
Captive Portal: NULL Pointer Dereference
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a try_to_authenticate NULL pointer dereference that can be triggered with a crafted GET HTTP with a missing client token query string parameter. Triggering this issue results in cr
- 7.5 High severity
Captive Portal: NULL Pointer Dereference
An issue was discovered in OpenNDS Captive Portal before 10.1.2. it has a do_binauth NULL pointer dereference that can be triggered with a crafted GET HTTP request with a missing client redirect query string parameter. Triggering this issue results in crashing