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CVE-2025-41767

Signature bypass on update upload

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 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41766

Stack buffer overflow on parsing web request

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 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41765

Unchecked role in wwwupload.cgi

Due to insufficient authorization enforcement, an unauthorized remote attacker can exploit the wwwupload.cgi endpoint to upload and apply arbitrary data. This includes, but is not limited to, contact images, HTTPS certificates, system backups for restoration, server peer configurations, and BACnet/SC server certificates and keys.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41764

Unchecked role in wwwupdate.cgi

Due to insufficient authorization enforcement, an unauthorized remote attacker can exploit the wwwupdate.cgi endpoint to upload and apply arbitrary updates.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41763

Unchecked role in wwwdnload.cgi

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 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41762

Secret leak with wwwdnload.cgi

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 3.1 · 6.2 Medium EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41761

Privilege escalation possible

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 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41760

Pass filter with Empty Table

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 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41759

Use of wildcard (“*” or “all”) in Block list

An administrator may attempt to block all networks by specifying "\*" or "all" as the network identifier. However, these values are not supported and do not trigger any validation error. Instead, they are silently interpreted as network 0 which results in no networks being blocked at all.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41758

Arbitrary Write with wwwupload.cgi

A low-privileged remote attacker can exploit an arbitrary file write vulnerability in the wwupload.cgi endpoint. Due to path traversal this can lead to overwriting arbitrary files on the device and achieving a full system compromise.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41757

Arbitrary Write with ubr-restore

A low-privileged remote attacker can abuse the backup restore functionality of UBR (ubr-restore) which runs with elevated privileges and does not validate the contents of the backup archive to create or overwrite arbitrary files anywhere on the system.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41756

Arbitrary Write with ubr-editfile

A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to write arbitrary files on the system.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41755

Arbitrary Read with ubr-logread

A low-privileged remote attacker can exploit the ubr-logread method in wwwubr.cgi to read arbitrary files on the system. The endpoint accepts a parameter specifying the log file to open (e.g., /tmp/weblog{some_number}), but this parameter is not properly validated, allowing an attacker to modify it to reference any file and retrieve its contents.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41754

Arbitrary Read with ubr-editfile

A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to read arbitrary files on the system.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more
CVE-2025-41772

wwwupdate.cgi Session token in URL

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 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Mbs Mbs-solutions
Products
Ubr-01 Mk Ii Ubr-02 Ubr-lon and 4 more