Is CVE-2012-4856 being actively exploited?

CVE-2012-4856 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2012-4856?

CVE-2012-4856 has a CVSS 2.0 base score of 7.9 (HIGH).

CVE-2012-4856

HIGH · CVSS 7.9EPSS 1.2%EU EUVD

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.

Key facts

CVSS score: 7.9 (v2.0)
Severity: HIGH
CVSS vector: AV:A/AC:M/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-255
EPSS score: 1.2% (68th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2012-4781)
Published: December 20, 2012
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2012-4781 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware
ibm / power 5 system firmware

References

http://aix.software.ibm.com/aix/efixes/security/squadrons_advisory.asc(Vendor Advisory)
http://www.kb.cert.org/vuls/id/194604(US Government Resource)
https://exchange.xforce.ibmcloud.com/vulnerabilities/79736

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain