PatchSiren

PatchSiren cyber security CVE debrief

CVE-2025-22457 Ivanti CVE debrief

CVE-2025-22457 affects Ivanti Connect Secure, Policy Secure, and ZTA Gateways and is described as a stack-based buffer overflow vulnerability. CISA added it to the Known Exploited Vulnerabilities catalog on 2025-04-04, which indicates confirmed real-world exploitation. CISA also marks the issue as having known ransomware campaign use, so exposed Ivanti gateway deployments should be treated as urgent remediation targets.

Vendor
Ivanti
Product
Connect Secure, Policy Secure, and ZTA Gateways
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2025-04-04
Original CVE updated
2025-04-04
Advisory published
2025-04-04
Advisory updated
2025-04-04

Who should care

Security teams, VPN/remote-access administrators, and incident responders responsible for Ivanti Connect Secure, Policy Secure, or ZTA Gateways—especially if the devices are internet-facing or used for privileged remote access.

Technical summary

The available source material identifies the issue as a stack-based buffer overflow in Ivanti Connect Secure, Policy Secure, and ZTA Gateways. The key defensive signal here is CISA KEV inclusion, meaning the vulnerability is known to be exploited in the wild. The source metadata also records known ransomware campaign use, raising the operational risk for any affected deployment.

Defensive priority

High. KEV listing plus known ransomware campaign use means this should be prioritized immediately over routine patch cycles.

Recommended defensive actions

  • Inventory all Ivanti Connect Secure, Policy Secure, and ZTA Gateway instances, including externally exposed appliances.
  • Apply the mitigations and vendor guidance referenced by CISA as soon as possible.
  • Use the vendor advisory and official vulnerability records to confirm the affected versions and required remediation path.
  • Treat the issue as urgent if the appliance is internet-facing or provides privileged remote access.
  • Review logs and device telemetry for signs of compromise, especially on systems that were exposed before mitigation.
  • If remediation cannot be completed immediately, reduce exposure by restricting access as much as operationally possible until fixes are applied.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and official resource links. The corpus states: vendorProject Ivanti; product Connect Secure, Policy Secure, and ZTA Gateways; vulnerabilityName 'Stack-Based Buffer Overflow Vulnerability'; dateAdded 2025-04-04; dueDate 2025-04-11; knownRansomwareCampaignUse 'Known'; and requiredAction to apply mitigations per CISA instructions. No exploit steps or unsupported impact claims are included.

Official resources

CISA KEV listing date: 2025-04-04. CISA remediation due date: 2025-04-11. This vulnerability is recorded as having known ransomware campaign use in the supplied source metadata.