How severe is CVE-2017-12542?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2017-12542 known to be exploited?

34 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Hewlett Packard Enterprise Integrated Lights-Out 4 (Ilo 4)

CVE-2017-12542

A authentication bypass and execution of code vulnerability in HPE Integrated Lights-out 4 (iLO 4) version prior to 2.53 was found.

Published 2018-02-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.993 (99.9th percentile), scored 2026-10-15.

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 99.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.993 · newest: 0.993 · change: 0.000

Affected products

Hewlett Packard Enterprise Integrated Lights-Out 4 (Ilo 4) — versions Prior to 2.53
HP Integrated Lights-Out 4
HP Integrated Lights-Out 4 Firmware

Public proof-of-concept exploits

References

www.securityfocus.com/bid/100467 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1039222 (VDB Entry, Third Party Advisory, vdb-entry)
www.exploit-db.com/exploits/44005/ (Exploit, VDB Entry, Third Party Advisory, exploit)
support.hpe.com/hpsc/doc/public/display (Vendor Advisory)

Frequently asked questions

What is CVE-2017-12542?: CVE-2017-12542 is a critical-severity vulnerability in Hewlett Packard Enterprise Integrated Lights-Out 4 (Ilo 4). CVSS score: 10.0/10. Published 2018-02-15.
How severe is CVE-2017-12542?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2017-12542 known to be exploited?: 34 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.