CVE-2025-8558: Insider Threat Management (ITM) Server versions prior to 7.17.2 contain an authentication bypass vulnerability

Q: How do I fix CVE-2025-8558?

insider threat management server: upgrade to 7.17.2. Exact commands for each OS are on this page.

Q: Is CVE-2025-8558 being exploited?

CVE-2025-8558 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-8558 affect?

CVE-2025-8558 affects insider threat management server. Severity is medium (CVSS 5.4). 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 exc

Q: How urgent is CVE-2025-8558?

Priority 31/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2025-8558 is a medium-severity flaw (CVSS 5.4) affecting insider threat management server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-306
Published	2025-11-03
Last modified	2026-10-18

Publisher (CNA): Proofpoint Inc. · Vendor: proofpoint

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-03 19:16 UTCPublished CVE record published
2026-10-18 21:10 UTCUpdated Record last modified

proofpoint insider threat management server UPGRADE

Affected: < 7.17.2

Fixed in: 7.17.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy insider-threat-management-server || rpm -q insider-threat-management-server || insider-threat-management-server --version

2. UPGRADE to 7.17.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade insider-threat-management-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade insider-threat-management-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-8558?

insider threat management server: upgrade to 7.17.2. Exact commands for each OS are on this page.

Is CVE-2025-8558 being exploited?

CVE-2025-8558 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-8558 affect?

CVE-2025-8558 affects insider threat management server. Severity is medium (CVSS 5.4). 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 exc

How urgent is CVE-2025-8558?

Priority 31/100. No elevated risk signals yet.

References

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