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ManageEngine ADAudit Plus EUVDEUVD-2026-48337

| CVE-2026-6516 CRITICAL
OS Command Injection (CWE-78)
2026-07-23 Zohocorp GHSA-3wh2-2f78-vx7j
10.0
CVSS 3.1 · Vendor: Zohocorp
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach ADAudit Plus agent API over network
  2. Delivery
    Send crafted request with injected OS command
  3. Exploit
    Server passes input to shell unsanitized
  4. Execution
    Arbitrary command executes as service account
  5. Persist
    Establish foothold on AD auditing host
  6. Impact
    Pivot within Active Directory environment

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK

2 techniques across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires network access to the ADAudit Plus agent API on a vulnerable server running any build before 8606; per the CVSS vector (AV:N/AC:L/PR:N/UI:N) no authentication, no elevated privileges, and no user interaction are needed, so any actor who can reach the agent API endpoint can attempt it against a default installation. The primary limiting factor is network reachability of the agent API - deployments where the ADAudit Plus server and its agent ports are firewalled off from untrusted networks (internal-only, no internet exposure) sharply narrow the attack surface - along with the version constraint (build 8606+ is not vulnerable). No special non-default feature toggle is documented as a prerequisite in the available data.

Impact

All authoritative signals point to top-tier risk: the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L) describes a network-reachable, low-complexity, unauthenticated attack with no user interaction and a scope change, yielding the maximum 10.0 score. The combination of unauthenticated access (PR:N) and OS command injection is exactly the profile that gets rapidly weaponized once details circulate, and ManageEngine products have a strong historical track record of being targeted (multiple prior ManageEngine RCEs have reached CISA KEV). Mitigating the urgency slightly: there is no public exploit identified at time of analysis, no CISA KEV listing, and no EPSS or SSVC data was provided in the input, so exploitation-probability scoring cannot be independently confirmed here. One internal inconsistency to verify: the vendor vector sets A:L (only low availability impact) even though full OS command execution would normally imply complete availability compromise (A:H) - this likely reflects a conservative vendor scoring choice rather than a real limitation. Net assessment: treat as a genuine emergency-patch item for internet- or broadly-network-exposed instances, not a high-CVSS-but-low-real-risk case.

Exploit ScenarioDerived

An attacker with network reachability to an ADAudit Plus server sends a crafted request to the exposed agent API endpoint, embedding shell metacharacters or command payloads into a parameter that the server passes to an OS command. Because no authentication is required (PR:N) and complexity is low, the injected command executes on the host in the context of the ADAudit Plus service, giving the attacker a foothold on an Active Directory auditing system. No public exploit identified at time of analysis, so this scenario is inferred from the CWE-78 classification and CVSS vector rather than an observed PoC.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 4.7% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 23, 2026

Remote code execution in Zohocorp ManageEngine ADAudit Plus (all builds before 8606) allows unauthenticated attackers to run arbitrary OS commands by abusing the product's agent API, which fails to sanitize input passed to a shell (CWE-78). Rated CVSS 10.0 by the vendor with a scope-changing vector, the flaw requires no privileges or user interaction and reaches the network-exposed agent communication channel directly. No public exploit identified at time of analysis and it is not listed in CISA KEV, but the maximal severity and unauthenticated nature make it a high-priority patch for any exposed deployment.

RemediationAI

Vendor-released patch: upgrade ManageEngine ADAudit Plus to build 8606 or later, which remediates the vulnerable agent API; follow the upgrade guidance in the vendor advisory at https://www.manageengine.com/products/active-directory-audit/cve-2026-6516.html. Until the upgrade is applied, reduce exposure of the agent API by restricting network access to the ADAudit Plus server and its agent communication ports to only trusted management subnets and known agent hosts (via host firewall or network ACLs), and ensure the server is not reachable from the internet - the trade-off is that any legitimately remote or roaming agents may fail to report until allow-listed. Because the product runs with elevated privileges, also consider temporarily isolating the ADAudit Plus host and monitoring it for anomalous child-process/command execution as a detection compensating control. Do not rely on these network controls as a permanent substitute for build 8606.

Affected VersionsENISA

ManageEngine ADAudit Plus 0 <8606

Affected Packages

euvd manageengine_adaudit_plus fix: 8606

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

ADAudit Plus is Zohocorp/ManageEngine's Active Directory, file server, and Windows auditing/UEBA platform; it uses lightweight agents deployed on monitored domain controllers and member servers that report back to the central server over an agent API. The vulnerability is classified as CWE-78 (Improper Neutralization of Special Elements used in an OS Command, i.e., OS command injection), meaning attacker-controlled data reaching the agent API is incorporated into a shell/command invocation without proper sanitization, allowing arbitrary command execution. The affected CPE is cpe:2.3:a:zohocorp:manageengine_adaudit_plus:*:*:*:*:*:*:*:*, covering all versions prior to build 8606. Because AD auditing agents and servers typically run with elevated (often SYSTEM or domain-privileged service) rights, code execution here tends to yield high-value access within an Active Directory environment.

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Severity by source

Vendor (Zohocorp) PRIMARY 10.0 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
vuln.today AI 9.8 CRITICAL

Unauthenticated network-reachable command injection with no interaction gives AV:N/AC:L/PR:N/UI:N; RCE as the service account yields full C:H/I:H/A:H, and I score S:U as host-local compromise absent clear evidence of cross-security-authority impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (Zohocorp).

CVSS VectorVendor: Zohocorp

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low

Lifecycle Timeline

2
Patch available
Jul 23, 2026 - 19:03 EUVD
CVE Published
Jul 23, 2026 - 17:22 cve.org
CRITICAL 10.0

DescriptionCVE.org

Zohocorp ManageEngine ADAudit Plus versions before 8606 are affected by Unauthenticated Remote code execution due to the vulnerable agent API.

Executive ViewAI

Why It Matters

ManageEngine ADAudit Plus versions before build 8606 contain a critical, unauthenticated remote code execution vulnerability in the agent API that allows attackers to execute arbitrary OS commands without authentication or privileges. Organizations running exposed ADAudit Plus instances face immediate risk of complete system compromise, potentially affecting audit trails and identity management controls. With no vendor patch currently available, immediate network isolation is required to protect this critical audit infrastructure.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis. Implement network segmentation to restrict access to the ADAudit Plus agent API (default port 6416) to internal trusted subnets only; apply host-based firewall rules and disable any external-facing agent communication if not operationally required. Implement enhanced monitoring and alerting on the agent API to detect exploitation attempts, including detection of command injection patterns and unusual process execution from the API endpoint. Enable network intrusion detection signatures targeting this CVE when available from your IDS/IPS vendor. These controls reduce attack surface exposure but do not eliminate the underlying vulnerability-vendor patch deployment remains critical and should be prioritized immediately upon release.

Threat Intelligence Overview

EPSS Score
4.7%
Top 9% exploitable
Prevalence
Medium
common enterprise AD auditing product, but not universally deployed
Social Media
1
Sightings
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 4.7%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Out-of-Cycle
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
Very High
Technical Impact
Total

Priority Score

55
Low Medium High Critical
KEV: 0
EPSS: +5
CVSS: +50
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

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