{"id":80909,"date":"2025-10-03T00:42:11","date_gmt":"2025-10-03T00:42:11","guid":{"rendered":""},"modified":"2025-10-29T11:38:52","modified_gmt":"2025-10-29T17:38:52","slug":"cve-2025-53734-use-after-free-vulnerability-in-microsoft-office-visio-allowing-unauthorized-code-execution","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53734-use-after-free-vulnerability-in-microsoft-office-visio-allowing-unauthorized-code-execution\/","title":{"rendered":"CVE-2025-53734: Use-After-Free Vulnerability in Microsoft Office Visio Allowing Unauthorized Code Execution<\/strong>"},"content":{"rendered":"

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

The CVE-2025-53734 vulnerability is a significant security flaw that affects Microsoft Office Visio, a crucial tool widely used for creating diagrams and flowcharts. This vulnerability stems from a use-after-free condition, which, if exploited, allows an unauthorized attacker to execute code locally. Given the widespread usage of Microsoft Office Visio across various sectors, this vulnerability could potentially affect<\/a> a large number of users, thus making it a matter of grave concern.<\/p>\n

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

CVE ID: CVE-2025-53734
\nSeverity: High (7.8 – CVSS Severity Score)
\nAttack Vector: Local
\nPrivileges Required: None
\nUser Interaction: Required
\nImpact: Potential system<\/a> compromise or data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

Microsoft Office<\/a> Visio | All prior to patch<\/p>\n

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

The vulnerability arises from a use-after-free condition in Microsoft Office<\/a> Visio. A use-after-free vulnerability occurs when a piece of memory<\/a> is freed (or de-allocated) but is still referenced later in the program. This can lead to unexpected behavior, including the potential for an attacker to manipulate the program to execute arbitrary code<\/a>.
\nIn this case, an attacker who successfully exploits this vulnerability could execute code<\/a> locally. This could enable the attacker to gain the same user rights as the current user, potentially leading to system<\/a> compromise or data leakage.<\/p>\n

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

Below is a hypothetical example showing how an attacker could possibly exploit this vulnerability<\/a>. The attacker sends a specially crafted Visio file, which contains malicious code, to the victim.<\/p>\n

POST \/upload\/visiofile HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/vnd.ms-visio.drawing\n{ \"visio_file\": \"[base64_encoded_malicious_visio_file]\" }<\/code><\/pre>\n
In this example, if the victim opens the malicious Visio file, the use-after-free condition is triggered, allowing the attacker’s code to be executed<\/a>.
\nIt’s important to note that this is a simplified example for illustrative purposes only. Actual exploit code<\/a> would likely be more complex and specific to the vulnerability in question.<\/p>\n
Mitigation and Prevention<\/strong><\/p>\n
Microsoft has already released a patch to address this vulnerability<\/a>. Users are strongly advised to apply this patch as soon as possible. If immediate patching is not feasible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation method. However, these are not long-term solutions and can only minimize risk, not eliminate it. Permanent mitigation can only be achieved by applying the vendor’s patch.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The CVE-2025-53734 vulnerability is a significant security flaw that affects Microsoft Office Visio, a crucial tool widely used for creating diagrams and flowcharts. This vulnerability stems from a use-after-free condition, which, if exploited, allows an unauthorized attacker to execute code locally. Given the widespread usage of Microsoft Office Visio across various sectors, this vulnerability […]<\/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":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-80909","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft"],"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