Is CVE-2025-8558 actively exploited?

CVE-2025-8558 has no public evidence of in-the-wild exploitation as of 2025-11-07.

What is the CVSS score for CVE-2025-8558?

CVE-2025-8558 has a CVSS score of 2.3 (LOW severity). Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2025-8558?

Patch guidance is available from proofpoint security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-8558.

Which products are affected by CVE-2025-8558?

1 product: proofpoint insider threat management server.

CVE-2025-8558 - remediation guidance & executive summary

Description

Insider Threat Management (ITM) Server versions prior to 7.17.2 contain an authentication bypass vulnerability that allows unauthenticated users on an adjacent network to perform agent unregistration when the number of registered agents exceeds the licensed limit. Successful exploitation prevents the server from receiving new events from affected agents, resulting in a partial loss of integrity and availability with no impact to confidentiality.

CVSS Metrics

Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: adjacent
Complexity: low
Privileges: none
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-306 · Missing Authentication

Metadata

Primary Vendor: PROOFPOINT
Published: 11/3/2025
Last Modified: 11/7/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

proofpoint : insider_threat_management_server

Remediation Guidance

Executive Summary

Cite this page

CVE-2025-8558. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2025-8558

View on NIST NVD

CVE-2025-8558 vulnerability