CVE-2025-69195 is a stack-based buffer overflow vulnerability identified in GNU Wget2 version 2.1.0. The flaw exists in the filename sanitization logic that processes URL paths controlled by an attacker. When filename restriction options are active, the sanitization mechanism fails to properly handle certain crafted URL inputs, allowing an attacker to overflow a stack buffer. This overflow can corrupt memory, causing the wget2 application to crash or potentially enabling further exploitation such as arbitrary code execution. The vulnerability is remotely exploitable by supplying a malicious URL, but exploitation requires user interaction to invoke wget2 with the crafted URL. The CVSS v3.1 base score is 7.6, reflecting high severity due to the combination of remote network attack vector, low attack complexity, no privileges required, but requiring user interaction. The impact includes confidentiality and integrity loss (limited) and high availability impact due to application crashes. No patches or known exploits are currently reported, but the vulnerability is publicly disclosed and should be addressed promptly.

The primary impact of CVE-2025-69195 is denial of service through application crashes caused by memory corruption. This can disrupt automated or manual file retrieval processes relying on wget2, affecting system availability. Additionally, the memory corruption could be leveraged for more severe attacks such as arbitrary code execution, potentially compromising system confidentiality and integrity. Organizations using wget2 in critical infrastructure, automated scripts, or CI/CD pipelines may face operational disruptions. The vulnerability's remote exploitability without privileges increases risk, especially in environments where wget2 processes untrusted URLs. Although no known exploits exist yet, the public disclosure and high CVSS score indicate a significant threat that could be weaponized by attackers targeting Linux and Unix-like systems where wget2 is deployed.

1. Upgrade to a patched version of GNU Wget2 once available from official sources to eliminate the vulnerability. 2. Until a patch is released, avoid using wget2 2.1.0 with untrusted or user-supplied URLs, especially when filename restriction options are enabled. 3. Implement input validation and sanitization at higher application layers to prevent malicious URLs from reaching wget2. 4. Use sandboxing or containerization to limit the impact of potential crashes or exploitation when wget2 is invoked. 5. Monitor wget2 usage logs for unusual URL patterns or crashes that may indicate exploitation attempts. 6. Employ network-level controls to restrict wget2 access to trusted sources only. 7. Educate users and administrators about the risks of processing untrusted URLs with wget2 and enforce strict operational procedures.