CVE-2025-57155
Published: 20 January 2026
Summary
CVE-2025-57155 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in Owntone Owntone Server. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 48.5th 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 SI-11 (Error Handling) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-57155 is a NULL pointer dereference vulnerability in the daap_reply_groups function within src/httpd_daap.c of owntone-server, affecting the software through commit 5e6f19a, a newer commit after version 28.2. This issue, mapped to CWE-476, 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), highlighting its potential for high-impact availability disruption without confidentiality or integrity effects.
Remote attackers can exploit this vulnerability over the network with low complexity, requiring no privileges or user interaction. Successful exploitation triggers a NULL pointer dereference, causing a denial of service through server crashes.
Advisories and patches provide mitigation guidance, including the security advisory at https://github.com/archersec/security-advisories/blob/master/owntone-server/owntone-server-advisory-2025.md and the fixing commit at https://github.com/owntone/owntone-server/commit/d857116e4143a500d6a1ea13f4baa057ba3b0028. Practitioners should consult these references for detailed remediation steps, such as applying the patch or upgrading to a fixed version.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-3326
Vulnerability details
NULL pointer dereference in the daap_reply_groups function in src/httpd_daap.c in owntone-server through commit 5e6f19a (newer commit after version 28.2) allows remote attackers to cause a Denial of Service.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
NULL pointer dereference enables remote application crash for DoS via software exploitation.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires timely remediation of software flaws such as the NULL pointer dereference in owntone-server, preventing exploitation via patching or upgrading.
Mandates secure error handling to prevent NULL pointer dereferences from causing server crashes and denial of service.
Provides protection against denial-of-service events like remote-triggered server crashes from this vulnerability.