CVE-2025-66263: high-severity vulnerability in DB Electronica Telecomunicazioni S.p.A.
Unauthenticated Arbitrary File Read via Null Byte Injection
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.9epss 0.4%
Unauthenticated Arbitrary File Read via Null Byte Injection in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, 7000 allows an attacker to perform Null byte injection in download_setting.php allows reading arbitrary files.
The `/var/tdf/download_setting.php` endpoint constructs file paths by concatenating user-controlled `$_GET['filename']` with a forced `.tgz` extension. Running on PHP 5.3.2 (pre-5.3.4), the application is vulnerable to null byte injection (%00), allowing attackers to bypass the extension restriction and traverse paths. By requesting `filename=../../../../etc/passwd%00`, the underlying C functions treat the null byte as a string terminator, ignoring the appended `.tgz` and enabling unauthenticated arbitrary file disclosure of any file readable by the web server user.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Affected products
DB Electronica Telecomunicazioni S.p.A. · Mozart FM TransmitterRelated CVEs — DB Electronica Telecomunicazioni S.p.A.
In the same product, most dangerous first.
CVE-2025-66261CRITICALUnauthenticated OS Command Injection (restore_settings.php)EPSS 2.3%CVE-2025-66253CRITICALUnauthenticated OS Command Injection (start_upgrade.php)EPSS 2.3%CVE-2025-66262CRITICALArbitrary File Overwrite via Tar Extraction Path TraversalEPSS 1.5%CVE-2025-66259CRITICALAuthenticated Root Remote Code Execution through improper filtering of HTTP post request parametersEPSS 0.7%CVE-2025-66251HIGHUnauthenticated Path Traversal with Arbitrary File DeletionEPSS 0.5%CVE-2025-66256CRITICALUnauthenticated Arbitrary File Upload (patch_contents.php)EPSS 0.5%