What is the CVSS score of CVE-2026-2040?

CVE-2026-2040 has a CVSS 3.0 base score of 7.3 (High). CVSS vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-2040?

Within 24 hours: Inventory all systems running PDF-XChange Editor and identify business criticality. Within 7 days: Disable PDF-XChange Editor where feasible or restrict user access to trusted administrators only; implement local access controls and monitor for suspicious privilege escalation attempts. Within 30 days: Monitor vendor communications for patch availability and establish a deployment plan; consider alternative PDF solutions if patches remain unavailable.

CVE-2026-2040

HIGH

Uncontrolled Search Path Element (CWE-427)

2026-02-20 zdi-disclosures@trendmicro.com

Privilege Escalation

7.3

CVSS 3.0 · NVD

View

Attack ChainAIDerived

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

Access

Obtain low-privileged code execution
Exploit

Place malicious library in unsecured search path
Execution

TrackerUpdate process loads attacker-controlled library
Impact

Execute arbitrary code with elevated privileges

Vulnerability Assessment

Weakness	CWE CWE-427 OWASP Top 10:2025 A08:2025 - Software or Data Integrity Failures ASVS 5.0 V13 - Configuration Search path element control
Exploitation Conditions	Attacker must execute low-privileged code on target system; user interaction required to trigger TrackerUpdate process; PDF-XChange Editor must load library from unsecured directory accessible to attacker.
Impact	CVSS 7.3 (HIGH). Attack vector: Local. Complexity: Low. Privileges required: Low. User interaction: Required. Exploitable via local access.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to escalate privileges on affected installations of PDF-XChange Editor.

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

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

PDF-XChange Editor's TrackerUpdate process loads libraries from an unsecured location, enabling local attackers with low-privileged code execution to escalate privileges and run arbitrary code with elevated permissions. This high-severity vulnerability (CVSS 7.3) affects systems where an attacker has already gained initial code execution access. No patch is currently available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:04 CVSS 7.3

RemediationAI

Monitor vendor advisories for a patch.

Affected ProductsAI

PDF-XChange Editor TrackerUpdate Uncontrolled Search Path Element Local Privilege Escalation Vulnerability

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

Classified as CWE-427 (Uncontrolled Search Path Element). PDF-XChange Editor TrackerUpdate Uncontrolled Search Path Element Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of PDF-XChange Editor. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the TrackerUpdate process. The product loads a library from an unsecured location. An attacker can leverage thi

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.3 HIGH

AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

PDF-XChange Editor TrackerUpdate Uncontrolled Search Path Element Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of PDF-XChange Editor. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the TrackerUpdate process. The product loads a library from an unsecured location. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of a target user. Was ZDI-CAN-27788.

Zero Day Initiative Advisories

ZDI-26-122 PDF-XChange Editor TrackerUpdate Uncontrolled Search Path Element Local Privilege Escalation Vulnerability Feb 2026

Executive ViewAI

Why It Matters

CVE-2026-2040 affects PDF-XChange Editor and allows local attackers to gain elevated system privileges. Organizations using this application face risk of unauthorized access and potential system compromise, particularly in environments where non-admin users have access to the software.

Business Impact: High

Compensating Controls

Restrict PDF-XChange Editor execution via application whitelisting; limit user account permissions to prevent local privilege escalation impact; isolate affected systems from sensitive network resources; disable auto-update features to prevent unauthorized changes; monitor process execution for TrackerUpdate.exe activity; require administrator approval for application installation; consider disabling the update component if not critical for operations.

Threat Intelligence Overview

EPSS Score

0.0%

Top 97% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

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 0.0%

Patch available No

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

Small

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +36

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Privilege Escalation HIGH

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.