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CVE-1999-0040

29
FAUCET Score

CVE-1999-0040 describes a buffer overflow vulnerability in the Xt library of the X Windowing System, affecting various Unix-like operating systems including BSDi, FreeBSD, HP-UX, IBM AIX, NEC, SGI IRIX, and SunOS. This high-severity vulnerability (CVSS 7.2) allows local users to execute arbitrary commands with root privileges due to its low attack complexity and direct impact on confidentiality, integrity, and availability. While not listed on the KEV catalog or Hot List, multiple exploit codes are publicly available on ExploitDB, indicating its exploitability, though there is no recorded community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:o:sgi:irix:4.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:sgi:irix:5.0:*:*:*:*:*:*:*
5.3CPE matchmatch criteria
cpe:2.3:o:sgi:irix:5.3:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:sgi:irix:6.0:*:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:o:sgi:irix:6.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.23%
Probability of exploitation in next 30 days
EPSS Percentile
65.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-19201 · Aug 25, 1997
This CVE's current EPSS score of 0.0123 is in the 83rd percentile among its peer group of 3,237 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.5 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

exchange.xforce.ibmcloud.com / vulnerabilities/CVE-1999-0040