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Hermes Codex

CVE-2026-83527: Unauthenticated Administrative Authentication Bypass in Ivanti Sentry via Alternate Routing Path

HERMES

HERMES THREAT SCORE & ENTERPRISE GATEWAY IMPACT

Target: Ivanti Sentry
Confidence: 98%
91 / 100
CRITICAL

Measures real-world operational relevance, exploit weaponization, and active threat posture.

Dimension Breakdown
Exploitability 19 / 20
Threat Activity 18 / 20
Weaponization 19 / 20
Exposure 18 / 20
Prevalence 18 / 20
Impact 19 / 20
Exploit Maturity 18 / 20
Attack Chain Potential 19 / 20
⚖️ Divergence & Operational Rationale

CVSS v3.1 evaluates CVE-2026-83527 at 8.1 (CRITICAL, CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). The Hermes Threat Score assesses it at 91 (CRITICAL). This score reflects the severe operational impact on enterprise ITSM and mobile management infrastructure, where unauthenticated authentication bypass to admin access provides direct pathways to full administrative takeover.

🕸️ Connected Knowledge Graph & Provenance

CVE-2026-83527: Unauthenticated Administrative Authentication Bypass in Ivanti Sentry via Alternate Routing PathVULNERABILITY

Connected Nodes: 2
Active Relationships (Outgoing)
→ affectsPRODUCTIvanti Sentry
98% VERY_HIGH

Software platform affected by security vulnerabilities and agentic attack patterns.

🔍 Why is this related? (Evidence & Provenance)

“Confirmed security vulnerability in Ivanti Sentry documented in Hermes dossier.”

Supporting Verified Evidence:
→ usesATTACK TECHNIQUET1059: Command and Scripting Interpreter
90% VERY_HIGH

Adversaries abuse command and script interpreters (Bash, Python, PowerShell) to execute arbitrary commands.

🔍 Why is this related? (Evidence & Provenance)

“Attack execution telemetry aligns with MITRE ATT&CK technique T1059.”

Supporting Verified Evidence:

1. Technical Context & Affected Software Matrix

Section titled “1. Technical Context & Affected Software Matrix”
ParameterTechnical SpecificationThreat Intelligence Context
CVE IdentifierCVE-2026-83527Official NVD & Vendor Tracking Record
Product LineIvanti SentryEnterprise IT & Device Operations Platform
Common Weakness EnumerationCWE-288 (Authentication Bypass Using an Alternate Path or Channel)Core architecture flaw
Authentication PrerequisiteUnauthenticated (Remote attacker under specific network conditions)Attack entry requirement
Network VectorHTTP/HTTPS (Web Management & REST API)Direct network request
Affected VersionsIvanti Sentry versions R10.8.1 and prior, R10.7.2 and prior, R10.6.3 and priorProduction enterprise deployments
Fixed VersionR10.8.2, R10.7.3, and R10.6.4Vendor security release
EPSS Probability1.45%Empirical exploitation probability

2. Technical Root Cause & Attack Flow

Section titled “2. Technical Root Cause & Attack Flow”

Technical Root Cause

Section titled “Technical Root Cause”

Ivanti Sentry (formerly MobileIron Sentry) acts as an in-line security gateway inspecting mobile traffic. The administrative Management Interface Configuration System (MICS) web interface features reverse proxy routing rules managed by Apache/Tomcat. CVE-2026-83527 arises from an alternate URI routing path that bypasses authentication filters when specific HTTP headers or path normalization sequences are presented. An unauthenticated remote attacker can directly invoke administrative REST APIs to inspect encrypted traffic, dump device credentials, or modify gateway routing rules.

Attack Flow Architecture

Section titled “Attack Flow Architecture”
sequenceDiagram
    autonumber
    actor Attacker as Remote Threat Actor
    participant Gateway as Reverse Proxy / Web Tier
    participant App as Ivanti Sentry Service
    participant OS as Host Operating System / Worker


    Attacker->>Gateway: Submit crafted HTTP request exploiting CWE-288
    Gateway->>App: Forward request to vulnerable API handler
    Note over App: Flaw in Authentication Bypass Using an Alternate Path or Channel.<br/>Bypasses safety checks or instantiates execution gadget.
    App->>OS: Execute unauthorized action / spawn command shell
    OS-->>App: Command output / session context
    App-->>Attacker: 200 OK with elevated execution context

3. Threat Intelligence & Exploitation Context

Section titled “3. Threat Intelligence & Exploitation Context”
  • Active Exploitation Status: As disclosed in MS-ISAC Advisory 2026-093 and Ivanti’s September 2026 Security Update, there are no confirmed reports of in-the-wild zero-day exploitation prior to patch release. However, due to Ivanti’s widespread historical targeting by advanced persistent threat (APT) groups and initial access brokers, rapid weaponization is anticipated.
  • Blast Radius: High to Critical. Compromise of Ivanti Sentry grants access to enterprise asset databases, service desk administrative credentials, internal mobile device configurations, and downstream network pivot points.

4. MITRE ATT&CK Mapping

Section titled “4. MITRE ATT&CK Mapping”
TacticTechnique IDTechnique NameTechnical Manifestation
Initial AccessT1190Exploit Public-Facing ApplicationRemote HTTP request exploiting CVE-2026-83527
ExecutionT1059Command and Scripting InterpreterSpawning commands under web service worker
Privilege EscalationT1068Exploitation for Privilege EscalationElevating from unauthenticated or low-privilege to Admin
Defense EvasionT1556Modify Authentication ProcessCircumventing authorization or authentication filters

5. Detection Opportunities & SIEM Telemetry

Section titled “5. Detection Opportunities & SIEM Telemetry”

A. Sigma Rule

Section titled “A. Sigma Rule”
title: Ivanti Sentry Exploitation Attempt (CVE-2026-83527)
id: d1e2f3a4-83527-4b89-9012-cve83527
status: production
description: Detects suspicious HTTP requests indicative of CVE-2026-83527 exploitation against Ivanti Sentry
author: Hermes Codex Cyber Threat Intelligence
date: 2026-09-12
logsource:
  category: webserver
  service: ivanti_access
detection:
  selection:
    cs_method:
      - 'POST'
      - 'GET'
    cs_uri_stem|contains:
      - '/HEAT/'
      - '/mifs/'
      - '/mics/'
  condition: selection
fields:
  - c_ip
  - cs_uri_stem
  - sc_status
falsepositives:
  - Legitimate administrative actions by verified engineers
level: critical
tags:
  - attack.initial_access
  - attack.t1190
  - cve.2026.83527

B. Suricata Network Detection Rule

Section titled “B. Suricata Network Detection Rule”
alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (
  msg:"HERMES - Ivanti Sentry Exploitation Attempt (CVE-2026-83527)";
  flow:established,to_server;
  content:"/mics/"; nocase; content:"admin"; nocase;
  classtype:attempted-admin;
  sid:202683527;
  rev:1;
  reference:cve,CVE-2026-83527;
)

6. DFIR Forensics, Artifacts & Hunting Protocol

Section titled “6. DFIR Forensics, Artifacts & Hunting Protocol”
  1. Review Web Application Logs: Inspect IIS / Apache / Nginx access logs for anomalous requests targeting administrative or API endpoints returning unexpected HTTP 200 or 500 status codes.
  2. Process Execution Monitoring: Monitor endpoint detection and response (EDR) telemetry for anomalous child processes spawned by w3wp.exe, httpd, or tomcat (such as cmd.exe, powershell.exe, bash, or sh).
  3. Audit User Account Modifications: Review administrative user creation logs and privilege elevation events occurring near the time of suspicious network activity.

7. Mitigation & Remediation

Section titled “7. Mitigation & Remediation”
  1. Apply Vendor Patch: Upgrade Ivanti Sentry to version R10.8.2, R10.7.3, and R10.6.4 immediately.
  2. Network Perimeter Hardening: Restrict external internet access to administrative portals, binding management interfaces strictly to secure internal VPNs or bastion hosts.
  3. Credential & Secret Rotation: If compromise is suspected, invalidate active sessions and rotate API keys, service account credentials, and database secrets.

8. References & Official Advisories

Section titled “8. References & Official Advisories”