Tenable Blog
SubscribeOracle April 2021 Critical Patch Update Addresses 257 CVEs including ‘Zerologon’ (CVE-2020-1472)
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...