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CVE-1999-1034

18
FAUCET Score

CVE-1999-1034 describes a local privilege escalation vulnerability within the login utility of AT&T System V Release 4. This flaw allows an unauthenticated local attacker to gain elevated privileges with low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. Despite its high CVSS score of 7.2, there is no known public exploit code, Metasploit modules, or evidence of active exploitation, and it has received no community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:o:att:svr4:4.0:*:*:*:*:*:*:*

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
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 47th percentile among its peer group of 3,241 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 0.5 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/583
cert.org / advisories/CA-1991-08.html
PatchThird Party AdvisoryUS Government Resource
ciac.org / ciac/bulletins/b-28.shtml
securityfocus.com / bid/23
PatchVendor Advisory