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ManageEngine EventLog Analyzer CVE-2026-8923

| EUVDEUVD-2026-115126 HIGH
OS Command Injection (CWE-78)
2026-11-02 Zohocorp GHSA-gw79-qx36-4v58
8.7
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
    Authenticate with high-privilege account
  2. Delivery
    Access Log Forward configuration
  3. Exploit
    Inject OS command (CWE-78)
  4. Execution
    Execute arbitrary code on server
  5. Impact
    Compromise SIEM host and collected logs

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 an authenticated, high-privilege account on ManageEngine EventLog Analyzer or Log360 (reflected by PR:H) with access to the 'Log Forward' configuration option, which is the specific feature that permits OS command injection (CWE-78). The vulnerability is network-reachable with no user interaction, so once an attacker holds the required privileged access it can be triggered remotely over the management interface. Limiting factors: the attacker must first obtain admin-level credentials or a valid privileged session, and only versions before 13062 are affected; the precise injectable input within the Log Forward feature is not described in the available sources.

Impact

This is a genuine but conditional priority rather than a drop-everything emergency. The provided CVSS 3.1 vector (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N, base 8.7) shows network reachability and low attack complexity, but PR:H means the attacker must already hold high privileges in the application - this is the single most important risk-limiting signal and it keeps the realistic threat to insiders or post-compromise attackers who have obtained admin-level credentials/session. The vuln.today decision label is 'this_week', consistent with a serious authenticated RCE that is not under active exploitation. No EPSS score was supplied, there is no CISA KEV listing, and no proof-of-concept or exploit reference is present (only the vendor advisory), so by the precision rules the status is 'no public exploit identified at time of analysis'. CWE-78 (OS command injection) plus the 'Command Injection'/'RCE' tags align with command execution on the host, which makes the impact severe once the privilege prerequisite is met. Note one internal inconsistency to verify: the supplied vector sets A:N (no availability impact), which is unusual for OS command execution that typically yields full host compromise including availability - this likely understates availability impact and should be confirmed against the vendor advisory. Overall: patch within the vendor/priority window, but the PR:H barrier means this is not comparable to an unauthenticated internet-facing RCE.

Exploit ScenarioDerived

An attacker who already has a privileged (administrative) account or hijacked admin session on ManageEngine EventLog Analyzer or Log360 abuses the Log Forward configuration option to inject operating-system commands, achieving remote code execution on the underlying server. Because these are centralized SIEM/log-management platforms, host compromise exposes collected logs from across the monitored environment. No public exploit code is identified at time of analysis, and exploitation requires the high-privilege authentication reflected by PR:H.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available

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AnalysisAIv1 – Nov 02, 2026

Authenticated remote code execution affects Zoho ManageEngine EventLog Analyzer and ManageEngine Log360 in all builds before 13062, where a user holding high privileges can inject operating system commands through the Log Forward configuration option. Because the flaw is network-reachable and requires no user interaction, an attacker who already holds admin-level credentials or a privileged session can turn log-forwarding configuration into arbitrary command execution on the host, with high confidentiality and integrity impact across a scope change. Priority is assessed as this_week rather than an emergency: no public exploit code has been identified at time of analysis, and exploitation depends on first obtaining privileged access to the product's management interface. The precise injectable input within Log Forward is not described in the available sources.

RemediationAI

Upgrade ManageEngine EventLog Analyzer and ManageEngine Log360 to build 13062 or later, which is the fixed version named in the vendor advisory at https://www.manageengine.com/products/eventlog/advisory/CVE-2026-8923.html; no other fixed versions or backport branches are listed in the available data. Because the flaw is only reachable by a high-privilege account, reducing the population of accounts that can open and modify the Log Forward configuration limits exposure, at the cost of narrowing administrative workflows for log-forwarding changes. Restricting network access to the product's management interface - for example to a dedicated administration network - lowers the AV:N exposure but does not remove the need to patch, since the vulnerable feature remains present in the affected builds. No public exploit code has been identified at time of analysis, so no exploit-specific blocking signature is prescribed; the available sources do not describe any vendor-supplied workaround beyond moving to build 13062.

Affected VersionsENISA

ManageEngine EventLog Analyzer 0 <13062
ManageEngine Log360 0 <13062

Affected Packages

euvd manageengine_eventlog_analyzer fix: 13062
euvd manageengine_log360 fix: 13062

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

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

Technical ContextAI · show details

The root cause class is CWE-78, OS command injection: the Log Forward component of ManageEngine EventLog Analyzer and Log360 builds input into a command executed by the underlying operating system without adequate neutralization. The assessed vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H describes the conditions rather than the trigger - network reachability of the management interface, low attack complexity, a high-privilege prerequisite (PR:H), no user interaction, and a scope change with high confidentiality and integrity impact (the vendor's own score of 8.7 differs only in rating availability as none). The injectable parameter itself is not described in the available sources, so the specific request or configuration field that carries the payload cannot be confirmed. Both CPE entries carry wildcard versions (cpe:2.3:a:zohocorp:manageengine_eventlog_analyzer and cpe:2.3:a:zohocorp:manageengine_log360), consistent with the advisory covering all releases prior to build 13062 across both products, which share the affected log-forwarding functionality.

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Severity by source

Vendor (Zohocorp) PRIMARY 8.7 HIGH
AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
vuln.today AI 9.1 CRITICAL

Network-reachable management UI (AV:N/AC:L), but requires high-privilege admin access to the Log Forward config (PR:H); OS command execution yields full host impact, so C/I/A:H and S:C for app-to-OS escape.

3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:H/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
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

2
Patch available
Nov 02, 2026 - 12:16 EUVD
CVE Published
Nov 02, 2026 - 10:32 cve.org
HIGH 8.7

DescriptionCVE.org

Zohocorp ManageEngine Eventlog Analyzer and ManageEngine Log360 versions before 13062 are vulnerable to Authenticated Remote Code Execution in Log Forward option.

Executive ViewAI

Why It Matters

A high-severity vulnerability in Zoho ManageEngine EventLog Analyzer and Log360 allows users with administrative access to execute arbitrary commands on the underlying server. This puts sensitive log data and system integrity at risk, particularly in organizations where privileged accounts are shared or not tightly controlled.

Business Impact: High
Compensating Controls

Restrict network access to the management interface, enforce strict least-privilege and separation of duties for admin accounts, enable detailed audit logging of Log Forward configuration changes, and monitor for anomalous command execution on the host.

Threat Intelligence Overview

Prevalence
Medium
widely used enterprise SIEM/log tools, but specific vendor products, not ubiquitous
Social Media
1
Sightings
Data Quality
4 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 HIGH
CISA KEV No
Public POC No
EPSS N/A
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
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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CVE-2018-8721 MEDIUM POC
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