CVE-2025-0282 is a stack-based buffer overflow vulnerability in Ivanti Connect Secure, Policy Secure, and ZTA Gateways. CISA added it to the Known Exploited Vulnerabilities catalogue on 8 January 2025, which means attackers have used it in real attacks. Ivanti Connect Secure, Policy Secure, and ZTA Gateways contain a stack-based buffer overflow which can lead to unauthenticated remote code execution.
What a stack-based buffer overflow means in Ivanti gateways
A stack-based buffer overflow occurs when software writes more data to a stack buffer than it can safely hold. In network-facing products such as Ivanti Connect Secure, Policy Secure, and ZTA Gateways, that weakness can become dangerous quickly because attacker-controlled input can reach the vulnerable code before any authentication step blocks it.
For this CVE, the practical significance is not just memory corruption. The issue can cross directly into remote code execution, which means the vulnerability can become a full device compromise rather than a limited crash or denial of service.
Why internet-facing gateway flaws are high impact
VPN and access gateway appliances sit at a trust boundary. They are designed to accept inbound traffic from outside the network, process it reliably, and mediate access to internal resources. When the flaw is in that entry point, exploitation can turn a perimeter control into an initial access path. NHIMG’s Ivanti Connect Secure exploitation 2024 shows how this product class has been abused before to steal credentials and gain durable access.
The core danger is that a gateway compromise can expose sessions, credentials, certificates, configuration data, and internal routing rules. Even when the vulnerable condition is a memory-safety bug, the operational outcome is often identity and access compromise as much as code execution.
How organisations determine exposure and exposure scope
Exposure assessment starts with a complete inventory of Ivanti devices, their deployment role, and whether they are reachable from the internet or through partner paths. Organisations should verify where the product is used, whether it is internet-facing, whether it terminates remote access, and whether there are any compensating controls that reduce direct exposure.
Authoritative version and patch guidance belongs with the vendor advisory and the NIST National Vulnerability Database, while the CVE Program remains the canonical record for the identifier itself. For prioritisation, the key question is not whether a device exists somewhere in the estate, but whether it is reachable, operationally critical, and able to receive remediation quickly.
When exposure is broad or uncertain, vulnerability management must treat the appliance as a high-priority edge asset rather than a routine server patch candidate. NHIMG’s Vulnerability Management Guide is useful here because KEV-listed issues should be handled through asset scope, verification, and remediation tracking, not only by severity score.
Remediation, detection, and compromise review
Remediation should follow the vendor’s fix path and CISA KEV guidance, but organisations should also assume that pre-patch exploitation may have already occurred if the device was exposed. That means reviewing logs, sessions, configuration drift, newly added accounts, altered certificates, and any signs that the appliance was used as a pivot into internal systems.
The detection challenge is that gateway exploitation may leave limited local evidence, especially if the attacker’s goal is persistence or credential harvesting rather than immediate disruption. Breach and Attack Simulation (BAS) Guide is relevant because organisations need to validate whether their monitoring would notice suspicious gateway behaviour, unexpected outbound connections, or follow-on lateral movement after an edge-device compromise.
If compromise is suspected, post-patch review should include credential rotation, session invalidation, and inspection of adjacent systems that the gateway could reach. For this product class, the question is not only whether the vulnerability is closed, but whether the attacker used it to gain durable access before closure.
Identity and access implications after exploitation
Although the flaw is a memory-safety issue, the downstream security impact often lands in identity material. A compromised gateway can expose VPN sessions, authentication material, service credentials, and certificates, any of which may need rotation or revocation after exploitation. That is why gateway incidents are often managed as both vulnerability events and identity incidents.
NHIMG’s Remote Access Identity Guide is a strong companion for understanding why remote access entry points require MFA, device checks, and retirement of dormant access paths. For a vulnerability like this one, those controls matter because they reduce the chance that a single edge-device flaw becomes broad internal compromise.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
MITRE ATT&CK addresses the attack and risk surface, while NIST SP 800-53 Rev 5 sets the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| MITRE ATT&CK | T1190 — Exploit Public-Facing Application | This CVE is a public-facing edge-device overflow exploited through inbound traffic. |
| Recommendation — Map exposed Ivanti gateways to T1190 and hunt for exploit attempts against internet-facing entry points. | ||
| NIST SP 800-53 Rev 5 | SI-16 — Memory Protection | Stack overflow exploitation is a memory-safety failure addressed by system integrity controls. |
| RA-5 — Vulnerability Monitoring and Scanning | KEV-listed vulnerabilities require continuous identification and prioritisation of exposed assets. | |
| IA-5 — Authenticator Management | Gateway compromise can expose or force rotation of credentials, tokens, and session material. | |
| Recommendation — Apply SI-16 to reduce memory-corruption exposure in externally reachable services. Use RA-5 to inventory affected gateways and prioritise remediation for KEV-listed exposure. Use IA-5 to rotate credentials and invalidate sessions after suspected appliance compromise. | ||
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Reviewed and updated by the NHIMG editorial team on October 17, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org