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CVE-2015-4049

18
FAUCET Score

CVE-2015-4049 describes a denial-of-service vulnerability affecting Unisys Libra 43xx, 63xx, and 83xx, and FS600 class systems running MCP-FIRMWARE versions prior to 40.0IC4 Build 270. This flaw allows remote authenticated users to trigger data corruption or a system crash by manipulating program operators with EPSILON-based codefiles during peak memory usage, leading to CPM stack corruption. With a CVSS score of 6.8 (Medium), the vulnerability requires low privileges and high attack complexity, but can result in high impact to integrity and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
40.0CPE matchmatch criteria
cpe:2.3:o:unisys:mcp-firmware:40.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.8MEDIUM

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.92%
Probability of exploitation in next 30 days
EPSS Percentile
56.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0092 is in the 48th percentile among its peer group of 1,428 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

public.support.unisys.com / common/public/vulnerability/NVD_Detail_Rpt.aspx
Vendor Advisory