Ivanti released security updates to address vulnerabilities (CVE-2025-0282, CVE-2025-0283) in Ivanti Connect Secure, Policy Secure, and ZTA Gateways. A cyber threat actor could exploit CVE-2025-0282 to take control of an affected system.

CISA has added CVE-2025-0282 to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation.

CISA urges organizations to hunt for any malicious activity, report any positive findings to CISA, and review the following for more information:

• Security Advisory Ivanti Connect Secure, Policy Secure & ZTA Gateways (CVE-2025-0282, CVE-2025-0283)

For all instances of Ivanti Connect Secure, Policy Secure, and ZTA Gateways, see the following steps for general hunting guidance:

1. Conduct threat hunting actions:  
   1. Run the In-Build Integrity Checker Tool (ICT). Instructions can be found here. 
   2. Conduct threat hunt actions on any systems connected to—or recently connected to—the affected Ivanti device.  
2. If threat hunting actions determine no compromise: 
   1. Factory reset the device and apply the patch described in Security Advisory Ivanti Connect Secure, Policy Secure & ZTA Gateways (CVE-2025-0282, CVE-2025-0283). 
   2. Monitor the authentication or identity management services that could be exposed. 
   3. Continue to audit privilege level access accounts. 
3. If threat hunting actions determine compromise: 
   1. Report to CISA and Ivanti immediately to start forensic investigation and incident response activities.  
   2. Disconnect instances of affected Ivanti Connect Secure products.  
   3. Isolate the systems from any enterprise resources to the greatest degree possible. 
   4. Revoke and reissue any connected or exposed certificates, keys, and passwords, to include the following: 
      1. Reset the admin enable password. 
      2. Reset stored application programming interface (API) keys. 
      3. Reset the password of any local user defined on the gateway, including service accounts used for auth server configuration(s).  
   5. If domain accounts associated with the affected products have been compromised: 
      1. Reset passwords twice for on premise accounts, revoke Kerberos tickets, and then revoke tokens for cloud accounts in hybrid deployments. 
      2. For cloud joined/registered devices, disable devices in the cloud to revoke the device tokens.
   6. After investigation, fully patch and restore system to service.

Organizations should report incidents and anomalous activity to CISA’s 24/7 Operations Center at Report@cisa.gov or (888) 282-0870. When available, please include the following information regarding the incident: date, time, and location of the incident; type of activity; number of people affected; type of equipment used for the activity; the name of the submitting company or organization; and a designated point of contact.

CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation.

• CVE-2025-0282 Ivanti Connect Secure Vulnerability

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

CISA urges organizations to apply mitigations as set forth in the CISA instructions linked below to include conducting hunt activities, taking remediation actions if applicable, and applying updates prior to returning a device to service

• Security Advisory Ivanti Connect Secure, Policy Secure & ZTA Gateways (CVE-2025-0282, CVE-2025-0283)
• CISA Mitigation Instructions for CVE-2025-0282 

Organizations should report incidents and anomalous activity to CISA’s 24/7 Operations Center at Report@cisa.gov or (888) 282-0870. When available, please include the following information regarding the incident: date, time, and location of the incident; type of activity; number of people affected; type of equipment used for the activity; the name of the submitting company or organization; and a designated point of contact.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the Known Exploited Vulnerabilities Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria.

Fortinet released a security update to address a vulnerability in FortiManager. A remote cyber threat actor could exploit this vulnerability to take control of an affected system.

Users and administrators are encouraged to review the following Fortinet Security Bulletin and apply the necessary updates:

• FG-IR-24-425

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).

View CSAF

1. EXECUTIVE SUMMARY

• CVSS v4 9.3
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Siemens
• Equipment: User Management Component (UMC)
• Vulnerability: Heap-based Buffer Overflow

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an unauthenticated remote attacker arbitrary code execution.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports the following products are affected:

• Opcenter Execution Foundation: All versions
• Opcenter Intelligence: All versions
• Opcenter Quality: All versions
• Opcenter RDL: All versions
• SIMATIC PCS neo V4.0: All versions
• SIMATIC PCS neo V4.1: All versions
• SIMATIC PCS neo V5.0: All versions prior to V5.0 Update 1
• SINEC NMS: All versions
• Totally Integrated Automation Portal (TIA Portal) V16: All versions
• Totally Integrated Automation Portal (TIA Portal) V17: All versions
• Totally Integrated Automation Portal (TIA Portal) V18: All versions
• Totally Integrated Automation Portal (TIA Portal) V19: All versions

3.2 Vulnerability Overview

3.2.1 HEAP-BASED BUFFER OVERFLOW CWE-122

Affected products contain a heap-based buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to execute arbitrary code.

CVE-2024-49775 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

A CVSS v4 score has also been calculated for CVE-2024-49775. A base score of 9.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Tenable reported this vulnerability to Siemens.

4. MITIGATIONS

Siemens has released new versions for several affected products and recommends updating to the latest versions. Siemens is preparing further fix versions and recommends countermeasures for products where fixes are not, or are not yet, available.

• SIMATIC PCS neo V5.0: Update to V5.0 Update 1 or later version
• SINEC NMS: Update SINEC NMS to V3.0 SP2 or later version and UMC to V2.15 or later version. Contact customer support to receive patch and update information.

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

• Filter the Ports 4002 and 4004 to only accept connections to/from the IP addresses of machines that run UMC and are part of the UMC network e.g. with an external firewall
• In addition if no RT server machines are used, Port 4004 can be blocked completely.

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage.

For more information see the associated Siemens security advisory SSA-928984 in HTML and CSAF.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

• December 19, 2024: Initial Publication