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CVE-2025-34049: OptiLink ONT1GEW GPON Remote Code Execution

9.4 CVSS

Description

An OS command injection vulnerability exists in the OptiLink ONT1GEW GPON router firmware version V2.1.11_X101 Build 1127.190306 and earlier. The router’s web management interface fails to properly sanitize user input in the target_addr parameter of the formTracert and formPing administrative endpoints. An authenticated attacker can inject arbitrary operating system commands, which are executed with root privileges, leading to remote code execution. Successful exploitation enables full compromise of the device.

Classification

CVE ID: CVE-2025-34049

CVSS Base Severity: CRITICAL

CVSS Base Score: 9.4

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Problem Types

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CWE-20 Improper Input Validation

Affected Products

Vendor: OptiLink

Product: ONT1GEW GPON

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.63% (probability of being exploited)

EPSS Percentile: 69.4% (scored less or equal to compared to others)

EPSS Date: 2025-07-09 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-34049
https://www.exploit-db.com/exploits/49955
https://optilinknetwork.com/
https://vulncheck.com/advisories/optilink-ont1gew-router-rce

Timeline