CVE-2025-69807
Published: 12 February 2026
Summary
CVE-2025-69807 is a high-severity Classic Buffer Overflow (CWE-120) vulnerability in P2R3 Bareiron. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 29.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SC-5 (Denial-of-service Protection) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2025-69807 is a buffer overflow vulnerability (CWE-120) in the p2r3 Bareiron software at commit 8e4d4020d. This flaw affects the server component, enabling unauthenticated remote attackers to trigger the issue through network traffic. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high severity primarily due to its impact on availability.
Attackers with network access to the vulnerable Bareiron server can exploit this by sending a specially crafted packet, causing a buffer overflow that leads to a denial of service. No authentication, privileges, or user interaction are required, and exploitation is straightforward given the low attack complexity.
Mitigation guidance and additional details are available in the referenced advisories at https://github.com/p2r3/bareiron and https://github.com/vmpr0be/bareiron-vr/blob/main/CVE-2025-69807.md.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-207243
Vulnerability details
p2r3 Bareiron commit: 8e4d4020d is vulnerable to Buffer Overflow, which allows unauthenticated remote attackers to cause a denial of service via a packet sent to the server.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Remote unauthenticated buffer overflow in public-facing server component directly enables T1190 (Exploit Public-Facing Application) and T1499.004 (Application or System Exploitation) for denial-of-service impact.
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Flaw remediation requires applying patches or updates to fix the specific buffer overflow vulnerability in the Bareiron server software.
Information input validation ensures that incoming network packets are properly checked and sanitized to prevent buffer overflows from specially crafted inputs.
Denial-of-service protection implements mechanisms like rate limiting and traffic filtering to mitigate availability impacts from buffer overflow exploits.