{"id":80608,"date":"2025-10-02T15:39:03","date_gmt":"2025-10-02T15:39:03","guid":{"rendered":""},"modified":"2025-10-28T23:38:55","modified_gmt":"2025-10-29T05:38:55","slug":"cve-2025-53732-critical-heap-based-buffer-overflow-vulnerability-in-microsoft-office","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53732-critical-heap-based-buffer-overflow-vulnerability-in-microsoft-office\/","title":{"rendered":"CVE-2025-53732: Critical Heap-based Buffer Overflow Vulnerability in Microsoft Office<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The Common Vulnerabilities and Exposures (CVE) system has recently identified a critical vulnerability, CVE-2025-53732, that poses a significant risk to users of Microsoft Office. This vulnerability, a heap-based buffer overflow, can be exploited by unauthorized attackers to execute code locally, potentially leading to system compromise or data leakage. Given the widespread usage of Microsoft Office<\/a> across industries and sectors, understanding and addressing this vulnerability is of paramount importance for organizations and individuals alike.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-53732
\nSeverity: High (7.8 CVSS Score)
\nAttack Vector: Local
\nPrivileges Required: None
\nUser Interaction: Required
\nImpact: System compromise<\/a> or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Microsoft Office<\/a> | All versions until patched<\/p>\n

How the Exploit Works<\/strong><\/p>\n

This vulnerability exploits a heap-based buffer overflow<\/a> in Microsoft Office. Essentially, the attacker overflows the application’s buffer<\/a> memory with more data than it can hold. The extra data then spills over into adjacent memory locations, corrupting or even overwriting the valid data held in them. If the attacker can control the data that overflows the buffer, they can manipulate the execution path of the program, leading to arbitrary code<\/a> execution.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

While actual exploit code will vary greatly depending on the specific buffer overflow<\/a> and the attacker’s goals, below is a simplistic, conceptual example of how a buffer overflow might be triggered.<\/p>\n

#include \nvoid vulnerable_function(char *input) {\nchar buffer[50];\nstrcpy(buffer, input);\n}\nint main() {\nchar malicious_input[100];\nfor (int i=0; i<100; i++)\nmalicious_input[i] = 'A';\nvulnerable_function(malicious_input);\nreturn 0;\n}<\/code><\/pre>\n
In this example, the `vulnerable_function` is designed to copy an input string into a buffer of size 50. However, if the input string is longer than what the buffer can hold, like the `malicious_input` of 100 'A's, a buffer overflow<\/a> occurs. This can potentially lead to arbitrary code execution<\/a>, with the specific effects dependent on the context and the attacker's goals.<\/p>\n
Mitigation<\/strong><\/p>\n
The best mitigation for this vulnerability is to apply the patch provided by the vendor as soon as it is available. Until then, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary measure to detect and block exploitation attempts. However, these measures only provide a stop-gap solution and do not eliminate the vulnerability<\/a>, so applying the vendor's patch should be a priority.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The Common Vulnerabilities and Exposures (CVE) system has recently identified a critical vulnerability, CVE-2025-53732, that poses a significant risk to users of Microsoft Office. This vulnerability, a heap-based buffer overflow, can be exploited by unauthorized attackers to execute code locally, potentially leading to system compromise or data leakage. Given the widespread usage of Microsoft […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[82],"product":[],"attack_vector":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-80608","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t