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CVE-2012-4856

24
FAUCET Score

CVE-2012-4856 describes a critical vulnerability in the Service Processor of IBM Power 5 systems (91##-### and 940#-###) prior to firmware SF240_418_382, where the firewall code fails to execute properly. This flaw allows remote attackers to execute arbitrary code through unspecified vectors. With a CVSS score of 7.9, this vulnerability is highly severe, requiring adjacent network access and medium attack complexity, but potentially leading to complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= sf240_418CPE matchmatch criteria
cpe:2.3:o:ibm:power_5_system_firmware:*:*:*:*:*:*:*:*
sf240_201_201CPE matchmatch criteria
cpe:2.3:o:ibm:power_5_system_firmware:sf240_201_201:*:*:*:*:*:*:*
sf240_202_201CPE matchmatch criteria
cpe:2.3:o:ibm:power_5_system_firmware:sf240_202_201:*:*:*:*:*:*:*
sf240_219_201CPE matchmatch criteria
cpe:2.3:o:ibm:power_5_system_firmware:sf240_219_201:*:*:*:*:*:*:*
sf240_222_201CPE matchmatch criteria
cpe:2.3:o:ibm:power_5_system_firmware:sf240_222_201:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.9HIGH

AV:A/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
ADJACENT_NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
5.5
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0117 is in the 78th percentile among its peer group of 239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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