CVE-2025-59295
Published: 14 October 2025
Summary
CVE-2025-59295 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked in the top 47.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-59295 is a heap-based buffer overflow vulnerability, classified under CWE-122, affecting Internet Explorer. Published on 2025-10-14T17:16:12.850, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact.
An unauthorized attacker can exploit this vulnerability over a network with low complexity and no required privileges, though it necessitates user interaction. Successful exploitation enables arbitrary code execution, compromising confidentiality, integrity, and availability at a high level.
The Microsoft Security Response Center provides guidance on this vulnerability, including patches and mitigation details, at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59295.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-34358
Vulnerability details
Heap-based buffer overflow in Internet Explorer allows an unauthorized attacker to execute code over a network.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap-based buffer overflow in Internet Explorer enables arbitrary code execution over the network with user interaction and no privileges, directly facilitating Exploitation for Client Execution (T1203).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires timely patching and remediation of known flaws like this heap-based buffer overflow in Internet Explorer to prevent exploitation.
Implements memory protections such as ASLR and DEP to directly mitigate heap-based buffer overflow exploits leading to arbitrary code execution.
Deploys malicious code defenses to block or detect exploit payloads targeting this Internet Explorer buffer overflow vulnerability.