CVE-2026-12645

Executive Summary

CVE-2026-12645 is a Missing Authorization vulnerability (CWE-862) in Ivanti Neurons for ITSM versions prior to 2026.2. The flaw permits a remote authenticated attacker to execute arbitrary code on the underlying server. Successful exploitation results in complete compromise of the ITSM platform, including full confidentiality, integrity, and availability impact, with a CVSS score of 9.9 reflecting the critical severity. No public proof-of-concept, vendor patch, or CISA KEV listing exists at the time of this analysis; however, given the criticality score and the high value of ITSM data, immediate mitigation measures are strongly advised.

Technical Analysis

The NVD description for CVE-2026-12645 identifies a Missing Authorization vulnerability (CWE-862) in Ivanti Neurons for ITSM. No additional technical detail is provided in the CNA description or vendor advisory, and no patch or vendor fix is currently documented by tracked sources.

Vulnerability Class Analysis (CWE-862 — Missing Authorization):
Missing Authorization vulnerabilities occur when a software component fails to enforce an appropriate access control policy before performing a sensitive action. In this context, an endpoint or function within Ivanti Neurons for ITSM does not verify that the authenticated user possesses the required role or privilege level for the operation being executed. CWE-862 differs from CWE-306 (Missing Authentication) in that the attacker is already authenticated to the system — the deficiency is in authorization checks, not authentication checks.

Attack Mechanism (class-level inference):
Since specific function names, endpoints, or file paths are not disclosed in the NVD description, the attack vector must be described generically:

1. An authenticated user issues a request to a sensitive server-side function (likely related to ITSM operations such as ticket processing, notification services, template rendering, or configuration management).
2. The server processes the request against a restricted resource without verifying the user's entitlement.
3. The lack of an authorization boundary allows the request to reach a high-privilege code path. Due to the resulting arbitrary code execution, the vulnerable code path likely processes user-supplied input in an unsafe manner — potentially through dynamic invocation, deserialization, or command construction — although the exact mechanism is unconfirmed.

The CVSS vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H) provides additional insight into the attack profile:

• Attack Vector (AV:N): Exploitable remotely over the network.
• Attack Complexity (AC:L): No special conditions or race conditions required.
• Privileges Required (PR:L): Low privileges — a standard authenticated ITSM user account suffices.
• User Interaction (UI:N): No victim interaction required.
• Scope (S:C): The impact crosses a security boundary, meaning the compromised component (e.g., the ITSM application or a plugin module) can impact resources beyond its intended scope.
• Confidentiality/Integrity/Availability (C:H/I:H/A:H): Full impact on all three security pillars.

Affected Systems:
Affected versions include all Ivanti Neurons for ITSM releases prior to 2026.2. The NVD data does not list specific affected versions, but the fixed version is indicated as 2026.2.

Exploitation Scenarios

No public PoC, exploit code, or Nuclei template exists for CVE-2026-12645 as of this writing. The following attack chain is inferred from the vulnerability class (Missing Authorization) and the CVSS profile. Insufficient technical detail is available from the CVE description to confirm the exact code path or payload implementation.

Step 1 — Reconnaissance / Target Identification:
An attacker with valid low-privileged credentials (e.g., a helpdesk operator or standard ITSM user) first authenticates to the Ivanti Neurons for ITSM web interface. The attacker identifies functional areas that appear to trigger high-privilege server-side operations, such as administrative report generation, system diagnostic tools, or workflow automation features. Shodan queries such as product:"Ivanti" or http.html:"Ivanti Neurons" could aid in discovering internet-exposed ITSM instances during initial target selection.

Step 2 — Triggering the Authorization Flaw:
The attacker sends crafted HTTP requests to server-side endpoints that should be restricted to administrators or users with elevated roles. For an application with a missing authorization flaw, the application likely fails to enforce an access control check, either because:

• The endpoint lacks an attribute-based access control filter;
• The check uses a flawed comparison (e.g., comparing to an empty/null role rather than a required role); or
• The authorization check occurs after the sensitive code path has already begun execution.

The attacker reaches a code path that executes a sensitive operation with the server's privileges, not the attacker's own privileges. This explains the scope change (S:C) in the CVSS — the elevated impact extends beyond the vulnerable application process.

Step 3 — Payload / Arbitrary Code Execution:
Because the CVSS profile shows full integrity and confidentiality impact with low complexity, the exploitation likely involves one of the following generic mechanisms (not confirmed by available data):

• Insecure Deserialization: The attacker submits a serialized object with a gadget chain to a vulnerable endpoint; upon deserialization, the chain triggers system command execution.
• Server-Side Template Injection / Remote Code Execution via Input Validation Gap: The attacker provides malicious input to a parameter processed by a dynamic evaluation function.
• File Upload to Web Root: The attacker uploads a web shell to a filesystem path that is subsequently executed within the application context.

Confirmation of these specifics requires further technical disclosure from Ivanti or independent security research, which is currently unavailable.

Step 4 — Post-Exploitation Impact:
Upon successful arbitrary code execution, the attacker gains code execution under the security context of the ITSM application server (typically a service account with broad filesystem and possibly database access). Because the scope is changed (S:C), the attacker may escalate beyond the web application layer to compromise the host OS, access adjacent systems, or pivot laterally within the ITSM infrastructure. ITSM platforms hold highly sensitive operational data — infrastructure configuration records, incident response data, entitlements, and privileged account information tied to change management workflows — making this a high-value target for supply-chain and enterprise attackers.

Note on available exploitation evidence:
The data indicates no public exploit, no exploitation in the wild, and no CISA KEV listing. Analyst confidence in active exploitation is therefore low, but the speed at which critical-severity ITSM vulnerabilities are weaponized suggests this status could change quickly. The attack chain above is class-level inference only and should be validated against vendor advisories when they are published.

Impact Assessment

Business Impact:

Ivanti Neurons for ITSM is a cloud-based and on-premises IT Service Management platform used for incident, problem, change, and asset management within enterprise environments. A full remote code execution vulnerability in this product presents an extreme business risk because:

1. Sensitive data exposure (C:H): ITSM systems store configuration management databases (CMDBs), which link business services to the underlying IT infrastructure, credentials for service accounts, and records of all authorized personnel and their access rights. Loss of confidentiality of this data enables targeted follow-on attacks.
2. Integrity compromise (I:H): An attacker with write access to the ITSM platform can alter change-management approvals, modify incident records, or inject malicious configurations that propagate to connected endpoints through automated ITSM workflows.
3. Availability risk (A:H): Destruction or ransomware-style encryption of ITSM data disrupts core IT operations — incident handling, change control, and asset tracking — often cascading into business-wide operational downtime.

CVSS Breakdown Reflected in the Score:
The scope-change component (S:C) distinguishes this vulnerability from those with same-scope impact and raises the severity above the typical high range. With a score of 9.9, this is a near-maximum-severity flaw warranting emergency attention despite the lack of an active exploit in the wild.

Blast Radius:

• Directly affected: Ivanti Neurons for ITSM deployments < 2026.2.
• Indirect blast radius: All connected business services managed through ITSM workflows; enterprise credentials stored or referenced by ITSM configuration items; any endpoints whose configuration is pushed from the ITSM platform.
• Operational impact: Loss of IT service continuity and potential attacker persistence in the IT management plane.

Detection Guidance

The following detection content targets behavioral indicators associated with exploitation of missing-authorization and subsequent remote code execution. Because no public signatures exist, these rules should be treated as heuristic baselines and tuned to your environment.

Sigma Rule

title: Potential Exploitation of Ivanti Neurons ITSM Missing Authorization (CVE-2026-12645)
status: experimental
description: Detects anomalous server-side code execution indicators following low-privilege authenticated access to Ivanti Neurons for ITSM.
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2026-12645
tags:
    - attack.privilege_escalation
    - attack.t1213
    - cve.2026-12645
logsource:
    category: process_creation
    product: windows
detection:
    selection_parent:
        ParentImage|endswith:
            - '\w3wp.exe'            # IIS worker process
            - '\Ivanti Neurons\'
    selection_suspicious_child:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
            - '\wscript.exe'
            - '\cscript.exe'
            - '\mshta.exe'
        CommandLine|contains:
            - 'IEX'
            - 'Invoke-'
            - 'wget'
            - 'curl'
            - '-enc'
            - 'certutil -urlcache'
    condition: selection_parent and selection_suspicious_child
falsepositives:
    - Administrative PowerShell or script execution as part of legitimate ITSM automations
level: high

YARA Rule

rule CVE_2026_12645_Ivanti_ITSM_Exploit_Signatures {
    meta:
        author = "Valter Security Research"
        description = "Detects common payload patterns associated with remote code execution in Ivanti Neurons ITSM exploitation"
        date = "2026-01-01"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-12645"
        score = 60
    strings:
        $s1 = "System.Diagnostics.Process" ascii wide
        $s2 = "ProcessStartInfo" ascii wide
        $s3 = "cmd.exe /c" ascii wide
        $s4 = "powershell -enc" ascii wide ascii
        $s5 = "whoami" ascii wide
        $s6 = "Invoke-Expression" ascii wide
        $s7 = "certutil -urlcache -split -f" ascii wide
        // URL patterns typical for payload staging
        $s8 = /http[s]?:\/\/[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}/ ascii
        $s9 = "byte[]" ascii wide
        $s10 = "FromBase64String" ascii wide
    condition:
        // Look for .NET deserialization/process execution snippets or
        // payloads containing both process-spawn AND network retrieval behavior
        uint16(0) == 0x4D5A  // MZ header, indicating executable payload that may be served in HTTP response bodies
        and (2 of ($s*)) or (($s3 or $s4) and 1 of ($s8))
}

Suricata IDS Rule

alert http any any -> $HOME_NET any (msg:"ET EXPLOIT Ivanti Neurons ITSM Arbitrary Code Execution Attempt (CVE-2026-12645)"; flow:established,to_server; content:"POST"; http_method; content:"/"; http_uri; content:"Runtime.InteropServices"; http_client_body; nocase; content:"Marshal"; http_client_body; nocase; content:"System.Diagnostics.Process"; http_client_body; nocase; reference:cve,2026-12645; classtype:attempted-admin; sid:2026012645; rev:1;)

Elastic Detection

// Detect common proxy-execution chains: web server spawning a shell after low-privilege web requests.
any where
  process.parent.name in ("w3wp.exe", "java.exe", "tomcat9.exe") and
  process.name in ("cmd.exe", "powershell.exe", "wscript.exe", "cscript.exe", "mshta.exe") and
  // correlate with incoming web traffic to ITSM module paths
  /* requires process.entity_id correlation to network events */
  process.executable != null

Splunk SPL Query

index=windows sourcetype=WinEventLog:Security OR sourcetype=XmlWinEventLog
| where EventCode=4688
| rename NewProcessName as child_process, ParentProcessName as parent_process
| search (parent_process="*w3wp.exe" OR parent_process="*java.exe") AND (child_process="*cmd.exe" OR child_process="*powershell.exe" OR child_process="*cscript.exe" OR child_process="*wscript.exe*")
| eval timeframe=relative_time(_time, "-10m")
| join timeframe [ search index=web sourcetype=iis earliest=-15m
    | stats count as web_requests by clientip, uri
    | where web_requests > 5
    | table clientip, uri]
| table _time, user, host, parent_process, child_process, CommandLine, clientip, uri
| sort - _time

Wazuh OSSEC Rule

<group name="local, web, access,">
  <rule id="100256" level="12">
    <decoded_as>json</decoded_as>
    <field name="event_type">^process$</field>
    <field name="parent_process">\.(w3wp|java)\.exe$</field>
    <field name="process">\.(cmd|powershell|wscript|cscript)\.exe$</field>
    <description>Potential CVE-2026-12645 exploitation: Web server process spawned a shell</description>
    <mitre>
      <id>T1213</id>
    </mitre>
    <group>process_creation,powershell_activity,cve-2026-12645</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch Status:
Patch confidence is 0/4 — no vendor fix has been identified from any tracked source at the time of this report. The NVD description references version 2026.2 as the target for remediation, but no official Ivanti advisory has been published confirming the fix, the release date is not disclosed, and no upgrade binaries are available.

Until an official patch is released, organizations must rely on compensating controls and layer security measures. The following actions are organized by immediacy.

1. Immediate Mitigations (Days 0–7):

• Restrict access: Limit network exposure of the Ivanti Neurons for ITSM interface. Place the service behind a VPN or zero-trust proxy; restrict source IP ranges to authorized corporate networks only.
• Principle of least privilege: Ensure all local ITSM accounts have minimal roles required for daily work. Suspend unused accounts. Review and revoke any credentials that may be shared among staff.
• Enable comprehensive audit logging: Ensure application-level audit trails and OS-level process creation events are enabled on the ITSM server before any incident occurs.
• Web Application Firewall (WAF): Deploy WAF virtual patches if the platform supports inline blocking. Generic rules monitoring for .NET deserialization patterns or server-side command injection indicators could provide interim mitigation.

2. Patch / Upgrade Steps (When Available):

• Monitor the official Ivanti security advisory page (https://www.ivanti.com/support/security-advisories) for the CVE-2026-12645 announcement.
• Validate that version 2026.2 contains the specific fix upon release. Confirm vendor notes state whether the fix addresses the missing authorization check and how the patch should be tested.
• Stage the 2026.2 upgrade in a non-production environment and validate all ITSM integrations before deploying to production.
• Test all detection rules above against the patched environment to ensure no false positives from legitimate administrator actions.

3. Long-Term Hardening:

• Update management: Establish a strict patch cadence for ITSM platforms; treat them as critical infrastructure components rather than business applications.
• Network segmentation: Ensure ITSM environments are isolated from general corporate domains, especially if they handle privileged account data.
• Credential hygiene: Never reuse service account passwords across ITSM components and connected infrastructure. Store credentials in a vault and rotate them regularly.
• Regular security reviews: Conduct quarterly authorization testing of all high-impact endpoints within ITSM tools to detect other missing-authorization flaws before attackers do.

References

1. NVD Entry: https://nvd.nist.gov/vuln/detail/CVE-2026-12645
2. Ivanti Security Advisories Portal: https://www.ivanti.com/support/security-advisories (Monitor for pending advisory)
3. MITRE ATT&CK Technique: T1213 — Exploitation for Privilege Escalation: https://attack.mitre.org/techniques/T1213/
4. CWE-862 Missing Authorization: https://cwe.mitre.org/data/definitions/862.html
5. CISA Known Exploited Vulnerabilities Catalog (No entry as of this report): https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Campaign Evidence: No threat actor campaigns, exploit-in-the-wild incidents, or analyzed malware samples mentioning CVE-2026-12645 have been documented by any tracked source. This status should be treated as preliminary and monitored for change given the critical CVSS rating.