What We Do
How we do it
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 →
Mar 15, 2023
CVE-2023-23397 - Microsoft Outlook Elevation of Privilege Zero-Day Vulnerability
THE THREAT On March 14th, as part of Microsoft’s monthly Patch Tuesday release, the company disclosed a critical, actively exploited vulnerability impacting Microsoft Office and Outlook. The…
Read More
View all Advisories →
About Us
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ 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
Mar 20, 2023
Exertis and eSentire Partner to Deliver 24/7 Multi-Signal MDR, Digital Forensics & IR Services and Exposure Management to Organisations Across the UK, Ireland, and Europe
Basingstoke, UK– 20 March, 2023. Leading technology distributor, Exertis, announced today that it has bolstered its cybersecurity services, adding eSentire, the Authority in Managed Detection and Response (MDR), to its Enterprise portfolio of offerings. eSentire’s award-winning, 24/7 multi-signal MDR, Digital Forensics & Incident Response (IR), and Exposure Management services will be available…
Read More
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
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.
Security advisories — Dec 03, 2021

Critical Zoho ManageEngine ServiceDesk Plus Vulnerability Exploited

1 minute read
Speak With A Security Expert Now


eSentire has observed active exploitation of the critical Zoho ManageEngine ServiceDesk Plus vulnerability CVE-2021-44077 (CVSS: 9.8). The vulnerability is classified as Remote Code Execution (RCE) and allows a remote and unauthenticated threat actor to upload executable files and deploy web shells on compromised assets.

Organizations making use of Zoho products are strongly recommended to ensure relevant security patches are deployed and run the available exploitation detection tool, provided by Zoho ManageEngine, to identify potential signs of compromise.

What we’re doing about it

What you should do about it

Additional information

eSentire discovered malicious activity while deploying detection for exploitation of CVE-2021-44077 and associated threats. CISA and the FBI have warned that Advanced Persistent Threat groups are actively exploiting CVE-2021-44077. Exploitation of this vulnerability may indicate that a wider intrusion has occurred, including the compromise of administrator credentials, lateral movements, and data exfiltration.


[1] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44077
[2] https://www.manageengine.com/products/service-desk/security-response-plan.html
[3] https://us-cert.cisa.gov/ncas/alerts/aa21-336a

View Most Recent Blogs