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Oracle April 2021 Critical Patch Update Addresses 257 CVEs including ‘Zerologon’ (CVE-2020-1472)

Oracle addresses over 250 CVEs in its second quarterly update of 2021 with 390 patches, including 34 critical updates. Background On April 20, Oracle released its Critical Patch Update (CPU) for Apri...
 Scott Caveza
April 21, 2021

CVE-2021-22893: Zero-Day Vulnerability in Pulse Connect Secure Exploited in the Wild

Threat actors are leveraging a zero-day vulnerability in Pulse Connect Secure, for which there is no immediate patch scheduled for release. Background On April 20, Pulse Secure, which was acquired by...

 Satnam Narang
April 20, 2021

NAME:WRECK: Nine DNS Vulnerabilities Found in Four Open Source TCP/IP Stacks

Nine new DNS-related vulnerabilities have been identified across TCP/IP stacks embedded in millions of devices. Background On April 13, 2021, researchers at Forescout and JSOF published a report calle...

 Rody Quinlan
April 15, 2021

CVE-2021-28480, CVE-2021-28481, CVE-2021-28482, CVE-2021-28483: Four Critical Microsoft Exchange Server Vulnerabilities Patched in April Patch Tuesday

One month after disclosing four zero-day vulnerabilities in Exchange Server, Microsoft addresses four additional vulnerabilities discovered by the National Security Agency (NSA). Background On April 1...

 Satnam Narang
April 13, 2021

Microsoft’s April 2021 Patch Tuesday Addresses 108 CVEs (CVE-2021-28310)

Microsoft addresses 108 CVEs, including CVE-2021-28310 — which has reportedly been exploited in the wild — as well as four new remote code execution vulnerabilities in Microsoft Exchange. 19Critical 8...

Security Response Team
April 13, 2021

CVE-2018-13379, CVE-2019-5591, CVE-2020-12812: Fortinet Vulnerabilities Targeted by APT Actors

Threat actors and ransomware groups are actively targeting three legacy Fortinet vulnerabilities. Background On April 2, the Federal Bureau of Investigation (FBI) along with the Cybersecurity and Infr...

 Satnam Narang
April 8, 2021

CVE-2021-21975, CVE-2021-21983: Chained Vulnerabilities in VMware vRealize Operations Could Lead to Unauthenticated Remote Code Execution

VMware has addressed a pair of vulnerabilities in vRealize Operations that, when chained together, could result in unauthenticated remote code execution in vulnerable servers. Background On March 30,...

 Rody Quinlan
March 31, 2021

How to Identify Compromised Microsoft Exchange Server Assets Using Tenable

As organizations continue to respond to a flurry of attacks by HAFNIUM and other threat actors leveraging Proxylogon (CVE-2021-26855) and related vulnerabilities (CVE-2021-26857, CVE-2021-26858, CVE-2...

 Satnam Narang
March 18, 2021

CVE-2021-22986: F5 Patches Several Critical Vulnerabilities in BIG-IP, BIG-IQ

F5 releases patches for multiple vulnerabilities in BIG-IP and BIG-IQ, including a critical remote command execution flaw that does not require authentication and is likely to attract exploits in the...

 Satnam Narang
March 11, 2021

Microsoft’s March 2021 Patch Tuesday Addresses 82 CVEs (CVE-2021-26411)

In its March release, Microsoft addressed 82 CVEs, including a zero-day vulnerability in Internet Explorer that has been exploited in the wild and linked to a nation-state campaign targeting security...

Security Response Team
March 9, 2021

Finding Proxylogon and Related Microsoft Exchange Vulnerabilities: How Tenable Can Help

We urge organizations to patch Proxylogon (CVE-2021-26855) and related vulnerabilities (CVE-2021-26857, CVE-2021-26858, CVE-2021-27065) in Microsoft Exchange Server and investigate for potential compr...

Security Response Team
March 8, 2021

CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065: Four Zero-Day Vulnerabilities in Microsoft Exchange Server Exploited in the Wild

Four zero-day vulnerabilities in Microsoft Exchange servers have been used in chained attacks in the wild.Update March 8, 2021: The Identifying Affected Systems section has been updated with informati...

 Satnam Narang
March 2, 2021

CVE-2021-21972: VMware vCenter Server Remote Code Execution Vulnerability

Proof-of-concept exploit scripts for a critical remote code execution flaw, along with mass scanning activity, indicate that organizations should apply vCenter Server patches immediately. Background O...

 Satnam Narang
February 24, 2021

Government Agencies Warn of State-Sponsored Actors Exploiting Publicly Known Vulnerabilities

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