Vulnerability · Published Nov 26, 2025 · Assigned by Gridware

CVE-2025-66262Arbitrary File Overwrite via Tar Extraction Path Traversal

Critical 9.3

In plain English

A critical-severity path traversal in Mozart FM Transmitter from DB Electronica Telecomunicazioni S.p.A.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 75% of all known vulnerabilities).

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)1.5%top 25.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Arbitrary File Overwrite via Tar Extraction Path Traversal 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 Tar extraction with -C / allow arbitrary file overwrite via crafted archive. The `restore_mozzi_memories.sh` script extracts user-controlled tar archives with `-C /` flag, depositing contents to the filesystem root without path validation. When combined with the unauthenticated file upload vulnerabilities (CVE-01, CVE-06, CVE-07), attackers can craft malicious .tgz archives containing path-traversed filenames (e.g., `etc/shadow`, `var/www/index.php`) to overwrite critical system files in writable directories, achieving full system compromise.

Affected products (as reported)

Vendor	Product	Versions
DB Electronica Telecomunicazioni S.p.A.	Mozart FM Transmitter	3050100300500100020003000

Weakness: CWE-22 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H/AU:N

References

https://www.abdulmhsblog.com/posts/webfmvulns/ exploit, technical-description