Security Vulnerabilities
A low-privileged remote attacker can trigger a stack-based buffer overflow via a crafted HTTP POST request using the ubr-network method resulting in full device compromise.
CVSS Score
8.8
EPSS Score
0.001
Published
2026-03-09
A high-privileged remote attacker can fully compromise the device by abusing an update signature bypass vulnerability in the wwwupdate.cgi method in the web interface of UBR.
CVSS Score
7.2
EPSS Score
0.0
Published
2026-03-09
An unauthenticated remote attacker can obtain valid session tokens because they are exposed in plaintext within the URL parameters of the wwwupdate.cgi endpoint in UBR.
CVSS Score
7.5
EPSS Score
0.001
Published
2026-03-09
In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed..
CVSS Score
7.5
EPSS Score
0.004
Published
2026-03-09
In nr modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service with no additional execution privileges needed.
CVSS Score
7.5
EPSS Score
0.002
Published
2026-03-09
An administrator may attempt to block all traffic by configuring a pass filter with an empty table. However, in UBR, an empty list does not enforce any restrictions and allows all network traffic to pass unfiltered.
CVSS Score
4.9
EPSS Score
0.0
Published
2026-03-09
A low‑privileged local attacker who gains access to the UBR service account (e.g., via SSH) can escalate privileges to obtain full system access. This is due to the service account being permitted to execute certain binaries (e.g., tcpdump and ip) with sudo.
CVSS Score
7.8
EPSS Score
0.0
Published
2026-03-09
An unauthenticated attacker can abuse the weak hash of the backup generated by the wwwdnload.cgi endpoint to gain unauthorized access to sensitive data, including password hashes and certificates.
CVSS Score
6.2
EPSS Score
0.0
Published
2026-03-09
A low‑privileged remote attacker can directly interact with the wwwdnload.cgi endpoint to download any resource available to administrators, including system backups and certificate request files.
CVSS Score
6.5
EPSS Score
0.0
Published
2026-03-09
Due to insufficient authorization enforcement, an unauthorized remote attacker can exploit the wwwupdate.cgi endpoint to upload and apply arbitrary updates.
CVSS Score
9.1
EPSS Score
0.001
Published
2026-03-09