Rewterz Threat Advisory –CVE-2021-20090 – Router Vulnerability Being Exploited In The Wild

Rewterz Threat Advisory – ICS: Delta Industrial Automation Security Zero-Day Vulnerabilities

August 9, 2021

Rewterz Threat Advisory –Multiple Microsoft Exchange Servers Security Vulnerabilities

Severity

High

Analysis Summary

CVE-2021-34473,CVE-2021-34523,CVE-2021-31207

Threat actors started actively scanning for the Microsoft Exchange ProxyShell remote code execution flaws. ProxyShell is the name of three vulnerabilities that could be chained by an unauthenticated remote attacker to gain code execution on Microsoft Exchange servers.

The vulnerabilities are exploited remotely through Microsoft Exchange’s Client Access Service (CAS) running on port 443 in IIS.

Impact

Code Execution
Unauthorized Access

Affected Vendors

Microsoft

Affected Products

Microsoft Exchange Server

Remediation

Microsoft has issued an update to correct this vulnerability. More details can be found at:

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-31207

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34473

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34523

Reading this advisory was a good start.

Make it a habit.

Rewterz publishes threat advisories ahead of mainstream cybersecurity media, informed by an AI-Native Autonomous SOC that sees regional threat actor activity in real time. Subscribe to receive each new advisory as it publishes, plus a monthly Middle East threat landscape brief drawn from our own SOC telemetry. For teams evaluating their detection coverage, a 30-minute consultation with a senior analyst is also available, at your pace, when you're ready.

Request a demo