Microsoft alarm: zero-day attacks against the Office package

Microsoft recently issued a warning to users of its popular Office software package, specifically regarding a zero-day vulnerability. This type of vulnerability, codenamed CVE-2021-40444, concerns a built-in feature of the software that, if maliciously exploited, could allow hackers to take control of users' computer systems. The most worrying news for Microsoft Office users is that there is currently no patch to fix this security issue.

Attacks in progress, but without remedy: the seriousness of the situation

The seriousness of the situation should not be underestimated; Microsoft has described the attack as active and ongoing, but there is currently no fix available. This means that hackers can freely exploit this vulnerability until a security patch is released. The attacks aim to manipulate a defect in the rendering of ActiveX, software components that are used to improve the interactivity of websites in Internet Explorer. If a hacker were to successfully exploit this flaw, he would potentially have full access to a user's systems, including the power to install, modify, or delete software.

Risk factor: legitimate document with malicious code

The attacks in question are carried out using legitimate documents but contaminated by malicious code. The document might seem harmless at first glance, but once opened, it could activate the malicious code and compromise system security. Microsoft experts have explicitly cited the use of Microsoft Word documents as a vehicle for attacks, potentially placing hundreds of millions of users at risk.

Microsoft looking for solutions and possible preventative measures

Despite the absence of a patch from Microsoft, experts are working hard to mitigate the threat and help keep users safe. At this time, Microsoft has recommended disabling the installation of all ActiveX controls in Office software as a temporary security measure; it is also working with business partners and the security community to identify solutions. Microsoft's Persistent Advanced Adversarial Protection (APT) team is continuously monitoring the situation and continuing to look for other ways users can protect themselves from this vulnerability until the expected patch is released.