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CVE-2022-26923 - Active Directory Domain Services Elevation of Privilege Vulnerability
THE THREAT Microsoft has disclosed a new vulnerability impacting Active Directory Certificate Services (ADCS) tracked as CVE-2022-26923 (Active Directory Domain Services Elevation of Privilege Vulnerability). If exploited successfully, an authenticated attacker can escalate privileges in environments where ADCS is running on the domain. eSentire is aware of technical details and tooling [2] for…
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eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1200+ organizations in 75+ 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.
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Cybersecurity Leader eSentire Continues Its Commitment to Rigorous Security Standards Earning PCI DSS Certification
Waterloo, ON, May 17, 2022 — eSentire, the Authority in Managed Detection and Response (MDR), maintains one of the most secure and robust IT environments of any MDR provider in the industry. To that end, eSentire today announced that it has received the Payment Card Industry Data Security Standard (PCI DSS) certification, considered one of the most stringent and comprehensive payment card…
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Security advisories — Mar 10, 2022

Mitel Vulnerability Exploited 

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On March 8th, 2022, the Canadian Centre for Cyber Security (CCCS) disclosed ongoing attacks exploiting the Mitel vulnerability CVE-2022-26143 (CVSS:9.8). The vulnerability impacts the Mitel MiCollab and MiVoice Business Express products. Exploitation of CVE-2022-26143 allows remote and unauthenticated threat actors to gain initial access to victim devices, execute code, and perform Denial-of-Service (DoS) attacks.

Security patches are not available for CVE-2022-26143. Organizations using Mitel MiCollab and MiVoice Business Express are strongly encouraged to ensure devices are secured behind a firewall to minimize the likelihood of exploitation.

What we’re doing about it

What you should do about it

Additional information

CVE-2022-26143 was initially reported in February 2022; exploitation of the vulnerability has been ongoing since at least February 18th. Attacks in the wild are reported to have been performed in order to launch large scale Distributed Denial of Service (DDoS) attacks.

It should be noted that CVE-2022-26143 has alternatively been referred to as CVE-2022-26487. These CVS designations are duplicates and CVE-2022-26487 has been depreciated.

Impacted Products:


[1] https://cyber.gc.ca/en/alerts/mitel-security-advisory-av22-123
[2] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26143/
[3] https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-22-0001
[4] https://mitel.custhelp.com/app/answers/answer_view/a_id/1017561 (Authentication Required)
[5] https://www.mitel.com/-/media/mitel/file/pdf/support/security-advisories/security-bulletin_22-0001-02-v1---mivbx.pdf
[6] https://blog.cloudflare.com/cve-2022-26143-amplification-attack/

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