What is the CVSS score of CVE-2026-4107?

CVE-2026-4107 has a CVSS 3.1 base score of 7.3 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.0%.

Which versions of Microsoft are affected by CVE-2026-4107?

ManageEngine Exchange Reporter Plus versions before 5802 contain a stored cross-site scripting vulnerability that allows authenticated users to inject malicious scripts into reports, potentially…. A patch is available.

How to fix or mitigate CVE-2026-4107?

Within 24 hours: Identify all Exchange Reporter Plus installations and document current versions via vendor reporting interface. Within 7 days: Upgrade all affected instances to version 5802 or later following ManageEngine's published patch instructions. Within 30 days: Conduct post-patch validation and review administrative account access logs for unauthorized activity during the exposure period.

Microsoft CVE-2026-4107

EUVD-2026-18625 HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-04-03 Zohocorp

GHSA-h96r-c882-j4mv

XSS Microsoft

7.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.3 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:07 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

5802

EUVD ID Assigned

Apr 03, 2026 - 12:00 euvd

EUVD-2026-18625

Analysis Generated

Apr 03, 2026 - 12:00 vuln.today

CVE Published

Apr 03, 2026 - 11:44 nvd

HIGH 7.3

DescriptionCVE.org

Zohocorp ManageEngine Exchange Reporter Plus versions before 5802 are vulnerable to Stored XSS in Folder Message Count and Size report.

AnalysisAI

Stored cross-site scripting in ManageEngine Exchange Reporter Plus before version 5802 allows authenticated attackers to inject malicious scripts via the Folder Message Count and Size report. With CVSS 7.3 (High severity) and requiring low-privilege authentication with user interaction, successful exploitation enables session hijacking and credential theft within the administrative interface. No public exploit identified at time of analysis, though CVSS vector indicates network-accessible attack surface with low complexity.

Technical ContextAI

This is a stored (persistent) XSS vulnerability classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). ManageEngine Exchange Reporter Plus is an email analytics and reporting solution for Microsoft Exchange environments that monitors mailbox usage, storage metrics, and messaging patterns. The vulnerability exists in the report generation module specifically handling Folder Message Count and Size data. Stored XSS occurs when user-supplied input (likely folder names, message attributes, or custom report parameters) is not properly sanitized before being stored in the database and subsequently rendered in HTML reports. The affected product CPE (cpe:2.3:a:zohocorp:manageengine_exchange_reporter_plus) indicates this is a Zohocorp product targeting Microsoft Exchange infrastructure monitoring, making it typically deployed in enterprise environments with access to sensitive email metadata and organizational communication patterns.

RemediationAI

Upgrade ManageEngine Exchange Reporter Plus to version 5802 or later, which remediates the stored XSS vulnerability in report generation modules. Organizations should immediately update to the vendor-released patched version following standard change management procedures. Review existing Folder Message Count and Size reports for potentially malicious injected content created before patching, particularly those generated by recently created or low-privilege user accounts. As an interim risk reduction measure if immediate patching is not feasible, restrict access to report creation and viewing functions to trusted administrative users only, and implement content security policies to mitigate XSS impact. Consult the official Zohocorp security advisory at https://www.manageengine.com/products/exchange-reports/advisory/CVE-2026-4107.html for additional deployment-specific guidance and verification procedures.