Citrix Releases Security Updates for Citrix ADC, Citrix Gateway

Citrix has released security updates to address a critical vulnerability CVE-2022-27518 in Citrix ADC and Citrix Gateway. An attacker could exploit this vulnerability to take control of an affected system. This vulnerability has been exploited in the wild. CISA encourages users and administrators...

Samba Releases Security Updates

The Samba Team has released security updates to address vulnerabilities in multiple versions of Samba. An attacker could exploit one of these vulnerabilities to take control of an affected system. The Cybersecurity and Infrastructure Security Agency CISA encourages users and administrators to...

CISA Adds Four Known Exploited Vulnerabilities to Catalog

CISA has added four new vulnerabilities to its Known Exploited Vulnerabilities Catalog, which require remediation from federal civilian executive branch FCEB agencies by December 1, 2021. CISA has evidence that threat actors are actively exploiting the vulnerabilities listed in the table below...

CISA Issues Emergency Directive and Releases Advisory Related to VMware Vulnerabilities

CISA has issued Emergency Directive ED 22-03 and released a Cybersecurity Advisory CSA in response to active and expected exploitation of multiple vulnerabilities in the following VMware products: VMware Workspace ONE Access Access, VMware Identity Manager vIDM, VMware vRealize Automation vRA,...

Updates on Microsoft Exchange Server Vulnerabilities

CISA has added seven Malware Analysis Reports MARs to Alert AA21-062A: Mitigate Microsoft Exchange Server Vulnerabilities. Each MAR identifies a webshell associated with exploitation of the vulnerabilities in Microsoft Exchange Server products. After successful exploiting a Microsoft Exchange...

CISA Releases Emergency Directive on Microsoft Windows Netlogon Remote Protocol

The Cybersecurity and Infrastructure Security Agency CISA has released Emergency Directive ED 20-04 addressing a critical vulnerability— CVE-2020-1472—affecting Microsoft Windows Netlogon Remote Protocol. An unauthenticated attacker with network access to a domain controller could exploit this...

Debug Exception May Cause Unexpected Behavior

CERT Coordination Center CERT/CC has released information for CVE-2018-8897 – unexpected behavior for debug exceptions. A local attacker could exploit this bug to obtain sensitive information. NCCIC encourages users and administrators to review CERT/CC’s Vulnerability Note VU 631579 for more...

CISA and FBI Release Secure by Design Alert on Eliminating OS Command Injection Vulnerabilities

Today, CISA and FBI are releasing their newest Secure by Design Alert in the series, Eliminating OS Command Injection Vulnerabilities, in response to recent well-publicized threat actor campaigns that exploited OS command injection defects in network edge devices CVE-2024-20399link is external,...

CISA Adds Four Known Exploited Vulnerabilities to Catalog

CISA has added four vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2024-40891link is external Zyxel DSL CPE OS Command Injection Vulnerability CVE-2024-40890link is external Zyxel DSL CPE OS Command Injection Vulnerability...

CISA Adds Two Known Exploited Vulnerabilities to Catalog

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2023-21237 Android Pixel Information Disclosure Vulnerability CVE-2021-36380 Sunhillo SureLine OS Command Injection Vulnerablity These types of vulnerabilities are...

Microsoft Releases Security Updates for Windows 10, Windows Server

Microsoft has released security updates to address vulnerabilities in Windows 10 and Windows Server. These vulnerabilities could allow a remote attacker to take control of an affected system. The Cybersecurity and Infrastructure Security Agency CISA encourages users and administrators to review t...

CISA Adds Two Known Exploited Vulnerabilities to Catalog

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2024-38812link is external VMware vCenter Server Heap-Based Buffer Overflow Vulnerability CVE-2024-38813link is external VMware vCenter Server Privilege Escalation...

ISC Releases BIND Security Updates

The Internet Systems Consortium ISC has released updates that address vulnerabilities in versions of ISC Berkeley Internet Name Domain BIND. A remote attacker could exploit these vulnerabilities to cause a denial-of-service condition. The Cybersecurity and Infrastructure Security Agency CISA...

CISA Adds Three Known Exploited Vulnerabilities to Catalog

CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2024-30088link is external Microsoft Windows Kernel TOCTOU Race Condition Vulnerability CVE-2024-9680link is external Mozilla Firefox Use-After-Free Vulnerability...

VMware vCenter Server Vulnerability CVE-2021-22005 Under Active Exploit

On September 21, 2021, VMware disclosed that its vCenter Server is affected by an arbitrary file upload vulnerability—CVE-2021-22005—in the Analytics service. A malicious cyber actor with network access to port 443 can exploit this vulnerability to execute code on vCenter Server. On September 24,...

CISA Adds One Known Exploited Vulnerability to Catalog

CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2023-6448 Unitronics Vision PLC and HMI Insecure Default Password These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose...

Samba Releases Security Updates 

The Samba Team has released security updates to address vulnerabilities in multiple versions of Samba. A remote attacker could exploit one of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review the following Samba Security Announcements...

Microsoft Releases Security Updates for its Malware Protection Engine

Microsoft has released updates to address a vulnerability in Microsoft Malware Protection Engine affecting multiple products. A remote attacker could exploit this vulnerability to take control of an affected system. US-CERT encourages users and administrators to review Microsoft's Advisory and...

CISA Adds Three Known Exploited Vulnerabilities to Catalog

CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2023-6549 Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability CVE-2023-6548 Citrix NetScaler ADC and NetScaler Gateway Code Injection...

Apache Releases Security Update for Apache HTTP Server

Updated October 7, 2021 Apache has released additional fixes for CVE-2021-41773, which is tracked as CVE-2021-42013. For more information see the Apache vulnerabilities page. Originally published October 6, 2021 The Apache Software Foundation has released Apache HTTP Server version 2.4.50 to...

FBI Update on Exploitation of Fortinet FortiOS Vulnerabilities

The Federal Bureau of Investigation FBI has released an FBI FLASH, APT Actors Exploiting Fortinet Vulnerabilities to Gain Access for Malicious Activity, which describes advanced persistent threat APT actors exploiting known Fortinet FortiOS vulnerabilities. APT actors may exploit these...

CISA Adds Six Known Exploited Vulnerabilities to Catalog

CISA has added six new vulnerabilities to its Known Exploited Vulnerabilities KEV Catalog, based on evidence of active exploitation. CVE-2026-21510link is external Microsoft Windows Shell Protection Mechanism Failure Vulnerability CVE-2026-21513link is external Microsoft MSHTML Framework Security...

VMware Releases Security Advisory for vCenter Server

VMware released a security advisory for vulnerabilities CVE-2023-34048, CVE-2023-34056 affecting the VMware vCenter Serverlink is external. A remote cyber actor could exploit one of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review the...

Abuse of the Service Location Protocol May Lead to DoS Attacks

The Service Location Protocol SLP, RFC 2608link is external allows an unauthenticated remote attacker to register arbitrary services. This could allow an attacker to use spoofed UDP traffic to conduct a denial-of-service DoS attack with a significant amplification factor. Researchers from Bitsigh...

CISA Releases Fifteen Industrial Control Systems Advisories

CISA released fifteen 15 Industrial Control Systems ICS advisories on February 16, 2023. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS. CISA encourages users and administrators to review the newly released ICS advisories f...

Cisco Releases Security Updates

Cisco has released security updates to address vulnerabilities in Cisco products. A remote attacker could exploit some of these vulnerabilities to take control of an affected system. For updates addressing lower severity vulnerabilities see the Cisco Security Advisories page. The Cybersecurity an...

F5 Releases Security Advisory for BIG-IP TMUI RCE vulnerability, CVE-2020-5902

F5 has released a security advisory to address a remote code execution RCE vulnerability—CVE-2020-5902—in the BIG-IP Traffic Management User Interface TMUI. An attacker could exploit this vulnerability to take control of an affected system. The Cybersecurity and Infrastructure Security Agency CIS...

CISA Adds Two Known Exploited Vulnerabilities to Catalog, Removes Five KEVs

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation: CVE-2023-42793 JetBrains TeamCity Authentication Bypass Vulnerability CVE-2023-28229 Microsoft Windows CNG Key Isolation Service Privilege Escalation Vulnerability Thes...

Apache Releases Security Advisory for Struts 2

The Apache Software Foundation has released a security advisory to address vulnerabilities in Struts in the version range 2.0.0—2.5.20. An attacker could exploit one of these vulnerabilities to take control of an affected system. The current version, Struts 2.5.22, is not affected. The...

Apache Releases Security Advisories for Apache Tomcat

The Apache Software Foundation has released security advisories to address multiple vulnerabilities in Apache Tomcat. An attacker could exploit these vulnerabilities to cause a denial-of-service condition. The Cybersecurity and Infrastructure Security Agency CISA encourages users and administrato...

CISA Adds Single-Factor Authentication to list of Bad Practices

Today, CISA added the use of single-factor authentication for remote or administrative access systems to our Bad Practices list of exceptionally risky cybersecurity practices. Single-factor authentication is a common low-security method of authentication. It only requires matching one factor—such...

CISA Adds One Known Exploited Vulnerability (CVE-2022-26134) to Catalog  

CISA has added one new vulnerability—CVE-2022-26134—to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risk to the federal enterprise. Note: to view t...

Palo Alto Networks Release Security Updates for PAN-OS

Palo Alto Networks has released security updates to address a vulnerability affecting PAN-OS firewall configurations with GlobalProtect portal and gateway interfaces. These updates address a vulnerability that only affects old versions of PAN-OS 8.1.16 and earlier. An unauthenticated attacker wit...

CISA Releases Cybersecurity Advisory on SimpleHelp RMM Vulnerability

Today, CISA released Cybersecurity Advisory: Ransomware Actors Exploit Unpatched SimpleHelp Remote Monitoring and Management to Compromise Utility Billing Software Provider. This advisory is in response to ransomware actors targeting customers of a utility billing software provider through...

CISA Adds Two Known Exploited Vulnerabilities to Catalog

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2024-21412 Microsoft Windows Internet Shortcut Files Security Feature Bypass Vulnerability CVE-2024-21351 Microsoft Windows SmartScreen Security Feature Bypass...

Google Releases Security Updates for Chrome

Google has released Chrome version 91.0.4472.101 for Windows, Mac, and Linux. This version addresses vulnerabilities that an attacker could exploit to take control of an affected system. One of these vulnerabilities—CVE-2021-30551—has been detected in exploits in the wild. CISA encourages users a...

ISC Releases Security Advisories for BIND

The Internet Systems Consortium ISC has released security advisories that address vulnerabilities affecting multiple versions of ISC Berkeley Internet Name Domain BIND. A remote attacker could exploit these vulnerabilities to cause a denial-of-service condition. The Cybersecurity and Infrastructu...

Samba Releases Security Updates

The Samba Team has released security updates to address vulnerabilities in multiple versions of Samba. An attacker could exploit some of these vulnerabilities to take control of an affected system. The Cybersecurity and Infrastructure Security Agency CISA encourages users and administrators to...

ISC Releases Security Advisories for BIND

The Internet Systems Consortium ISC has released security advisories that address vulnerabilities affecting multiple versions of ISC Berkeley Internet Name Domain BIND. A remote attacker could exploit one of these vulnerabilities to obtain sensitive information. The Cybersecurity and Infrastructu...

Microsoft Releases Guidance on High-Severity Vulnerability (CVE-2025-53786) in Hybrid Exchange Deployments

Update 08/12/2025: CISA has updated this alert to provide clarification on identifying Exchange Servers on an organization’s networks and provided further guidance on running the Microsoft Exchange Health Checker. Update 08/07/2025: CISA issued Emergency Directive ED 25-02: Mitigate Microsoft...

CISA Adds Three Known Exploited Vulnerabilities to Catalog

CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2024-41713link is external Mitel MiCollab Path Traversal Vulnerability CVE-2024-55550link is external Mitel MiCollab Path Traversal Vulnerability CVE-2020-2883lin...

Updated: New Software Updates and Mitigations to Defend Against Exploitation of Ivanti Connect Secure and Policy Secure Gateways

Note: CISA will update this Alert with more information as it becomes available. Updated Feb. 15, 2024: On Feb. 14, 2024, Ivanti released new software updates for Ivanti Connect Secure and Ivanti Policy Secure. Review Ivanti's updated KB articlelink is external for more information. End of Feb. 1...

CRI-O Security Update for Kubernetes

CRI-O has released a security update addressing a critical vulnerability—CVE-2022-0811—in CRI-O 1.19. A local attacker could exploit this vulnerability to take control of an affected Kubernetes environment as well as other software or platforms that use CRI-O runtime containers. CISA encourages...

Updated: APT Exploitation of ManageEngine ADSelfService Plus Vulnerability

The Federal Bureau of Investigation FBI, CISA, and Coast Guard Cyber Command CGCYBER have updated the Joint Cybersecurity Advisory CSA published on September 16, 2021, which details the active exploitation of an authentication bypass vulnerability CVE-2021-40539 in Zoho ManageEngine ADSelfService...

CISA Adds Two Known Exploited Vulnerabilities to Catalog

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities KEV Catalog, based on evidence of active exploitation. CVE-2021-22175link is external GitLab Server-Side Request Forgery SSRF Vulnerability CVE-2026-22769link is external Dell RecoverPoint for Virtual Machines RP4VMs Us...

CISA Adds Four Known Exploited Vulnerabilities to Catalog

CISA has added four new vulnerabilities to its Known Exploited Vulnerabilities KEV Catalog, based on evidence of active exploitation. CVE-2025-31125link is external Vite Vitejs Improper Access Control Vulnerability CVE-2025-34026link is external Versa Concerto Improper Authentication Vulnerabilit...

ISC Releases Security Advisories for Multiple Versions of BIND 9

The Internet Systems Consortium ISC has released security advisories that address vulnerabilities affecting multiple versions of the ISC’s Berkeley Internet Name Domain BIND 9. A remote attacker could exploit these vulnerabilities to potentially cause denial-of-service conditions and system...

CISA Updates Best Practices for Mapping to MITRE ATT&CK®

Today, CISA updated Best Practices for MITRE ATT&CK® Mapping. The MITRE ATT&CK® framework is a lens through which network defenders can analyze adversary behavior and, as CISA Executive Assistant Director Eric Goldstein noted in his June 2021 blog post on the framework, it directly supports...

Critical ForgeRock Access Management Vulnerability

Malicious cyber actors are actively exploiting a pre-authorization remote code execution vulnerability CVE-2021-35464 in ForgeRock Access Management—a commercial open access management solution that is based on OpenAM, an open-source access management solution. An attacker exploiting this...

CISA Releases Analysis Reports on New FiveHands Ransomware

CISA is aware of a recent, successful cyberattack against an organization using a new ransomware variant, known as FiveHands, that has been used to successfully conduct a cyberattack against an organization. CISA has released AR21-126A: FiveHands Ransomware and MAR-10324784-1.v1: FiveHands...