Microsoft issued an emergency patch for a high-severity zero-day vulnerability in Office that allows attackers to bypass document security checks and is being exploited in the wild via malicious files.
Microsoft pushed the emergency patch for the zero‑day, tracked as CVE-2026-21509, and classified it as a “Microsoft Office Security Feature Bypass Vulnerability” with a CVSS score of 7.8 out of 10. The flaw allows attackers to bypass Object Linking and Embedding (OLE) mitigations that are designed to block unsafe COM/OLE controls inside Office documents. This means a malicious attachment could infect a PC despite built-in protections.
Read more…
Source: Malwarebytes Labs
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Attackers scan 1.6 million WordPress sites for vulnerable plugin
July 15, 2022
Security researchers have detected a massive campaign that scanned close to 1.6 million WordPress sites for the presence of a vulnerable plugin that allows uploading files without authentication. The attackers are targeting the Kaswara Modern WPBakery Page Builder, which has been abandoned by its author before receiving a patch for a critical severity flaw tracked as ...
- Cyber Safety Review Board Releases Unprecedented Report of its Review into Log4j Vulnerabilities and Response
July 14, 2022
WASHINGTON – Today, the U.S. Department of Homeland Security (DHS) released the Cyber Safety Review Board’s (CSRB) first report, which includes 19 actionable recommendations for government and industry. The recommendations from the CSRB – an unprecedented public-private initiative that brings together government and industry leaders to review and assess significant cybersecurity events to better protect ...
- Uncovering a macOS App Sandbox escape vulnerability: A deep dive into CVE-2022-26706
July 13, 2022
Microsoft uncovered a vulnerability in macOS that could allow specially crafted codes to escape the App Sandbox and run unrestricted on the system. We shared these findings with Apple through Coordinated Vulnerability Disclosure (CVD) via Microsoft Security Vulnerability Research (MSVR) in October 2021. A fix for this vulnerability, now identified as CVE-2022-26706, was included in ...
- From cookie theft to BEC: Attackers use AiTM phishing sites as entry point to further financial fraud
July 12, 2022
A large-scale phishing campaign that used adversary-in-the-middle (AiTM) phishing sites stole passwords, hijacked a user’s sign-in session, and skipped the authentication process even if the user had enabled multifactor authentication (MFA). The attackers then used the stolen credentials and session cookies to access affected users’ mailboxes and perform follow-on business email compromise (BEC) campaigns against ...
- Defense contractor pays $9m to settle whistleblower’s cybersecurity allegations
July 11, 2022
Aerojet Rocketdyne, which makes propulsion and power systems for launch vehicles, missiles and satellites for NASA and the US military, has agreed to pay $9 million to settle charges it misrepresented its products’ compliance with cybersecurity requirements in federal government contracts. The El Segundo, California-based company has a deep history in American space and military contracting, ...
- Security advisory accidentally exposes vulnerable systems
July 6, 2022
A security advisory for a vulnerability (CVE) published by MITRE has accidentally been exposing links to remote admin consoles of over a dozen vulnerable IP devices since at least April 2022. BleepingComputer became aware of this issue yesterday after getting tipped off by a reader who prefers to remain anonymous. The reader was baffled on seeing ...