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CVE-2002-0988

25
FAUCET Score

CVE-2002-0988 describes a critical buffer overflow vulnerability in the X server (Xsco) of Caldera OpenUNIX 8.0.0 and UnixWare 7.1.1, potentially linked to XBM/xkbcomp functionalities. With a CVSS score of 10.0, this vulnerability allows unauthenticated attackers to achieve complete compromise (confidentiality, integrity, and availability) over the network with low attack complexity. Despite its high severity and FAUCET Risk Score of 81/100, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
7.1.1CPE matchmatch criteria
cpe:2.3:a:caldera:unixware:7.1.1:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:caldera:openunix:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.96%
Probability of exploitation in next 30 days
EPSS Percentile
78.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0196 is in the 62nd percentile among its peer group of 51,506 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, 0.1 Mastodon, and 0.4 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

ftp.sco.com / pub/updates/OpenUNIX/CSSA-2002-SCO.38
iss.net / security_center/static/9977.php
securityfocus.com / bid/5577