CVE-2026-26113 is a high-severity vulnerability in Microsoft Office, specifically related to an untrusted pointer dereference. This type of vulnerability allows unauthorized attackers to execute code locally, potentially leading to significant consequences for organizations. The CVSS score for this vulnerability is 8.4, indicating a high level of risk.
The risk to organizations includes unauthorized access to sensitive data and the potential for further exploitation of connected systems. Given the nature of the vulnerability and its ability to be exploited without user interaction, it is critical for organizations to address this issue promptly.
Currently, there is no public exploit or proof of concept available for CVE-2026-26113, but the exploitation status should not lead to complacency. Organizations should prioritize patching immediately to mitigate this vulnerability and protect their environments.
The urgency for defenders is high due to the potential impact on confidentiality, integrity, and availability of systems utilizing affected Microsoft products. Timely remediation is essential to safeguard against possible exploitation.
Vulnerability Details
The official description of CVE-2026-26113 states that it allows an unauthorized attacker to execute code locally due to an untrusted pointer dereference in Microsoft Office. This vulnerability is classified under CWE-822, which pertains to improper restriction of operations within the bounds of a memory buffer.
The CVSS score of 8.4 indicates a high severity level, emphasizing the need for immediate attention. The vulnerability affects several Microsoft products, including Microsoft 365 Apps, Microsoft Office 2016, 2019, and the Long Term Servicing Channel versions. The vulnerability was published on March 10, 2026.
Technical Analysis
The root cause of CVE-2026-26113 is an untrusted pointer dereference, which may allow attackers to manipulate memory and execute arbitrary code. The attack vector is classified as local, meaning that the attacker must have local access to the affected system.
The attack complexity is low, and no privileges are required to exploit this vulnerability, making it easier for attackers to execute their payloads. Additionally, there is no user interaction required, which increases the risk of exploitation.
The confidentiality, integrity, and availability impacts of this vulnerability are all rated as high, indicating that successful exploitation could lead to unauthorized access to sensitive data, alteration of data, or denial of service.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2026-26113 is significant, as it affects widely used Microsoft Office products, which are prevalent in many organizational environments. The blast radius potential is extensive given the number of users that may be impacted by the vulnerability.
Organizations should address this vulnerability in their priority patch cycle to mitigate the risks associated with potential exploitation. The urgency is underscored by the high CVSS score and the lack of known exploits, which may indicate that attackers are actively seeking to leverage this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerable versions include various products from Microsoft, such as Microsoft 365 Apps, Microsoft Office 2016, 2019, and the Long Term Servicing Channel versions 2021 and 2024. Specifically, all versions prior to the vendor patch are affected.
Mitigation & Remediation
Organizations should monitor for updates and apply the relevant patches as soon as they are available. It is crucial to validate remediation through penetration testing to ensure that the vulnerability has been effectively mitigated.
Detection Guidance
Organizations should implement logging mechanisms to capture any anomalies that may indicate exploitation attempts. Monitoring for unusual memory access patterns and unexpected application behavior can help detect potential exploitation of this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2026-26113 represents a critical vulnerability that highlights the ongoing challenges organizations face with software security. As vulnerabilities like this are discovered, they serve to remind security teams of the importance of proactive security measures, including regular updates and security assessments.
The exploitation potential of this vulnerability, while not currently leveraged in the wild, suggests a need for organizations to remain vigilant and responsive to emerging threats. Lessons learned from such vulnerabilities can inform better defensive strategies.
In conclusion, organizations should not only prioritize patching but also consider comprehensive security assessments, such as application security assessments, to strengthen their overall security posture against similar vulnerabilities.
Organizations should also be aware of the evolving threat landscape and the potential for ransomware to exploit such vulnerabilities in the future. Regular updates to security protocols and ongoing training for staff can significantly enhance an organization's resilience.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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