CVE-2025-66692
Published: 20 January 2026
Summary
CVE-2025-66692 is a high-severity Buffer Over-read (CWE-126) vulnerability in Trustwallet Trust Wallet Core. 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 38.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-66692 is a buffer over-read vulnerability (CWE-126) in the PublicKey::verify() method of Binance - Trust Wallet Core prior to commit 5668c67. This flaw allows attackers to trigger a Denial of Service (DoS) condition through a crafted input. The vulnerability carries a CVSS v3.1 base score of 7.5, rated as High severity with the vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating network accessibility, low attack complexity, no privileges or user interaction required, and high impact on availability.
Remote, unauthenticated attackers can exploit this vulnerability by supplying malicious input to the affected PublicKey::verify() function, causing a buffer over-read that crashes the application and results in a DoS. No privileges, user interaction, or special access are needed, making it feasible for attackers targeting systems or applications integrating vulnerable versions of Trust Wallet Core.
Mitigation is addressed in the patching commit at https://github.com/trustwallet/wallet-core/commit/5668c67, which users should apply to versions before 5668c67. Further technical details are provided in the advisory gist at https://gist.github.com/inkman97/b791189338f73b758c31a7db3cd50c2d. The CVE was published on 2026-01-20T21:16:04.437.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-3336
Vulnerability details
A buffer over-read in the PublicKey::verify() method of Binance - Trust Wallet Core before commit 5668c67 allows attackers to cause a Denial of Service (DoS) via a crafted input.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer over-read in PublicKey::verify() directly enables remote unauthenticated application exploitation leading to crash/DoS (T1499.004).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires timely identification, reporting, and correction of the buffer over-read flaw in Trust Wallet Core's PublicKey::verify() via patching to commit 5668c67, directly preventing DoS exploitation.
Mandates validation of untrusted inputs to PublicKey::verify() to reject crafted data that triggers the buffer over-read and subsequent crash.
Provides memory safeguards like address space randomization and page protections that mitigate the effects of buffer over-read vulnerabilities in cryptographic functions.