{"cve":"CVE-2025-66263","nvd":{"published":"2025-11-26T01:16:09.880","modified":"2026-10-19T13:10:00.110","status":"Analyzed","description":"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.\nThe `/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_v4":{"vector":"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","score":8.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-158"],"references":["https://www.abdulmhsblog.com/posts/webfmvulns/"],"products":["dbbroadcast:mozart_dds_next_1000_firmware","dbbroadcast:mozart_dds_next_100_firmware","dbbroadcast:mozart_dds_next_2000_firmware","dbbroadcast:mozart_dds_next_3000_firmware","dbbroadcast:mozart_dds_next_300_firmware","dbbroadcast:mozart_dds_next_30_firmware","dbbroadcast:mozart_dds_next_3500_firmware","dbbroadcast:mozart_dds_next_500_firmware","dbbroadcast:mozart_dds_next_50_firmware","dbbroadcast:mozart_dds_next_6000_firmware","dbbroadcast:mozart_dds_next_7000_firmware","dbbroadcast:mozart_next_1000_firmware","dbbroadcast:mozart_next_100_firmware","dbbroadcast:mozart_next_2000_firmware","dbbroadcast:mozart_next_3000_firmware","dbbroadcast:mozart_next_300_firmware","dbbroadcast:mozart_next_30_firmware","dbbroadcast:mozart_next_3500_firmware","dbbroadcast:mozart_next_500_firmware","dbbroadcast:mozart_next_50_firmware","dbbroadcast:mozart_next_6000_firmware","dbbroadcast:mozart_next_7000_firmware"],"source":"nvd","synced_at":"2026-10-19T22:16:02.354564667+00:00"},"epss":{"cve":"CVE-2025-66263","score":0.00393,"percentile":0.33203,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}