CVE-2012-4856

What it is

The Service Processor in the IBM Power 5 91##-### and 940#-### before SF240_418_382 does not ensure that firewall code is executed, which allows remote attackers to execute arbitrary code via unspecified vectors.

At a glance

Exploitability

Can be exploited from the same network segment without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

1.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2012-12-20 12:02 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:45 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.2% in the next 30 days (EPSS).
• Severity: 7.9 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2012-12-20 12:02 UTC

Last modified

2026-06-16 23:45 UTC

Exploit probability

1.2% · EPSS, next 30 days

Weakness

CWE-255

Record status

Modified

Affected

• IBM Power 5 System Firmware ≤ sf240_418
• IBM Power 5 System Firmware sf240_201_201
• IBM Power 5 System Firmware sf240_202_201
• IBM Power 5 System Firmware sf240_219_201
• IBM Power 5 System Firmware sf240_222_201
• IBM Power 5 System Firmware sf240_233_201
• IBM Power 5 System Firmware sf240_258_201
• IBM Power 5 System Firmware sf240_259_201

Attack profile CVSS 2.0 · 7.9

Attack vector

Adjacent network

Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Is it in your code?

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