What We Do
How we do it
Resources
TRU INTELLIGENCE CENTER
Our Threat Response Unit (TRU) publishes security advisories, blogs, reports, industry publications and webinars based on its original research and the insights driven through proactive threat hunts.
View Threat Intelligence Resources →
SECURITY ADVISORIES
Jan 19, 2023
Increased Activity in Google Ads Distributing Information Stealers
THE THREAT On January 18th, 2023, eSentire Threat Intelligence identified multiple reports, both externally and internally, containing information on an ongoing increase in Google advertisements…
Read More
View all Advisories →
Company
ABOUT ESENTIRE
About Us
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1500+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
Read about how we got here
Leadership Work at eSentire
LATEST PRESS RELEASE
Dec 13, 2022
eSentire Named First Managed Detection and Response Partner by Global Insurance Provider Coalition
Waterloo, ON – December 13, 2022 – eSentire, Inc., the Authority in Managed Detection and Response (MDR), today announced it has been named the first global MDR partner by Coalition, the world’s first Active Insurance provider designed to prevent digital risk before it strikes. Like Coalition, eSentire is committed to putting their customers’ businesses ahead of disruption by improving their…
Read More
Partners
PARTNER PROGRAM
e3 Ecosystem
We provide sophisticated cybersecurity solutions for Managed Security Service Providers (MSSPs), Managed Service Providers (MSPs), and Value-Added Resellers (VARs). Find out why you should partner with eSentire, the Authority in Managed Detection and Response, today.
Learn more
ECOSYSTEM PARTNER RESOURCES
Apply to become an e3 ecosystem partner with eSentire, the Authority in Managed Detection and Response.
Login to the Partner Portal for resources and content for current partners.
Search
Resources
Security advisories — Mar 09, 2021

Browser Zero-Day Vulnerability

1 minute read
Speak With A Security Expert Now

THE THREAT

In the March Microsoft Patch Tuesday release, Microsoft disclosed an actively exploited zero-day vulnerability impacting the Edge (EdgeHTML-based) and Internet Explorer (versions 9 & 11) web-browsers. The vulnerability is tracked as CVE-2021-26411 and received a criticality score of 8.8/10. If exploited, the vulnerability allows for Remote Code Execution (RCE).

Organizations are strongly recommended to apply the security patches provided by Microsoft, as attacks have been identified in the wild.

What we’re doing about it

What you should do about it

Additional information

Details of real-world attacks involving CVE-2021-26411 have not been shared. It is currently unclear how widespread exploitation is of the vulnerability.

In an attack scenario, a threat actor could either host their own malicious page or compromise another website. Users visiting the malicious page from a vulnerable browser will result in the compromise. The only required user interaction is viewing the malicious page, making this an ideal vulnerability for drive-by exploit attacks.

Vulnerable Products:

References:

[1] https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26411

View Most Recent Blogs