CVE-2026-70316
Summary
by MITRE • 08/11/2026
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
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Analysis
by VulDB Data Team • 08/11/2026
This vulnerability represents a critical weakness in Microsoft Office PowerPoint's input validation mechanisms that enables unauthorized information disclosure through malformed file inputs. The flaw occurs when the application fails to properly validate and sanitize user-supplied data during the processing of presentation files, creating an avenue for attackers to extract sensitive information from the target system. According to cwe-20 standards, this vulnerability falls under improper input validation where the software does not adequately check or filter input data before processing it, leading to potential security breaches that can compromise system integrity and confidentiality.
The technical implementation of this vulnerability typically manifests when PowerPoint processes specially crafted presentation files containing maliciously formatted elements or embedded objects. Attackers can construct PowerPoint files with malformed content that triggers unexpected behavior in the application's parsing routines, potentially causing the software to inadvertently expose system information such as file paths, memory contents, or other sensitive data structures. This type of vulnerability aligns with attack techniques described in the mitre att&ck framework under initial access and privilege escalation phases where adversaries seek to gather intelligence about target systems before executing more sophisticated attacks.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can serve as a foothold for more comprehensive attacks. An attacker who successfully exploits this weakness could potentially gain insights into the target system's file structure, application configurations, or even network topology information that would otherwise remain hidden. The local nature of the information disclosure means that attackers typically need to convince users to open malicious presentation files, often through social engineering tactics such as phishing campaigns or compromised websites where PowerPoint documents are hosted. This makes the vulnerability particularly dangerous in enterprise environments where users frequently interact with external content and may not be adequately trained about security risks associated with document processing applications.
Mitigation strategies for this vulnerability should focus on both immediate defensive measures and long-term architectural improvements. Microsoft has released patches and updates to address the specific input validation issues, but organizations must also implement comprehensive security awareness training programs to reduce the risk of users inadvertently executing malicious content. Network-level protections such as email filtering, web application firewalls, and strict file type restrictions can help prevent the delivery of malicious presentation files to target systems. Additionally, implementing application whitelisting policies that restrict execution of PowerPoint files from untrusted sources, combined with regular security assessments and vulnerability scanning, provides layered protection against exploitation attempts. Organizations should also consider disabling unnecessary features in PowerPoint applications and maintaining up-to-date security software to reduce the attack surface available to potential adversaries targeting these types of input validation vulnerabilities.