Ivanti Gateway Stack-Based Buffer Overflow (CVE-2025-0282)

Historical catalog analysis: CISA added this entry on January 08, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2025-0282 is a stack-based buffer overflow (CWE-121) affecting specific Ivanti gateway products. This vulnerability allows an unauthenticated attacker to achieve remote code execution (RCE) on the target system.

Exposure and applicability

This vulnerability applies to organizations deploying the following Ivanti technologies:
* Connect Secure
* Policy Secure
* ZTA Gateways

Because this flaw permits unauthenticated access, any instance of these gateways exposed to untrusted networks is at high risk. The source indicates that this vulnerability has been utilized in known ransomware campaigns.

Potential breach-prevention strategy

The reported entry path is an unauthenticated remote code execution via a buffer overflow; however, the specific network packets or triggers used to initiate the overflow remain unknown from the provided data.

Our analysis suggests that a similar breach could have been mitigated through the following prioritized actions:

1. Pre-deployment Exposure Reduction: Restricting gateway management interfaces and access to known, trusted IP ranges could have reduced the likelihood of initial access by unauthenticated external actors. (Responsible: Network Security Engineer; Verification: External port scan/ACL audit).
2. Aggressive Patch Cycle for Edge Assets: Prioritizing updates for edge-facing appliances over internal systems could have shortened the window of exposure. (Responsible: Vulnerability Management Lead; Verification: Version auditing against vendor advisories).
3. Post-Compromise Detection: Implementing behavioral monitoring to detect anomalous process execution on the gateway could have limited damage by alerting defenders to RCE activity. (Responsible: SOC Analyst; Verification: Log review for unauthorized shell spawns). This is a detection control and does not prevent initial compromise.

Remediation priorities

Remediation must follow a sequence that accounts for potential existing compromise, as applying a patch to an already breached system may not remove the attacker. Our analysis recommends the following priority order:

1. Threat Hunting: Conduct hunt activities to identify indicators of compromise (IoCs) before updating software.
2. Remediation Actions: If evidence of compromise is found during hunting, execute necessary remediation steps to purge the adversary from the environment.
3. Update Application: Apply the vendor-supplied updates to resolve the underlying buffer overflow.
4. Service Restoration: Return devices to active service only after both hunting and patching are complete.

How to validate remediation

Verification of a fix must go beyond confirming a version number. To ensure exposure is reduced, defenders should:
* Verify Patch Application: Confirm the installed firmware version matches the patched release specified by Ivanti.
* Validate Hunt Results: Document the completion of hunt activities and the absence (or successful removal) of malicious artifacts.
* Configuration Audit: Verify that any compensating controls or mitigations recommended in CISA instructions are active and enforced.

Limits and open questions

Applying updates and conducting hunts could reduce the likelihood of future exploitation, but residual risk remains if the attacker has already established persistence via methods not covered by the standard hunt activities. It is unknown whether other vulnerabilities exist within the same components that could be used to bypass these specific mitigations.

Source and editorial note

CVE-2025-0282: Ivanti Connect Secure, Policy Secure, and ZTA Gateways Stack-Based Buffer Overflow Vulnerability · Source date: January 08, 2025 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: January 11, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: October 29, 2026 at 00:05 UTC.

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