Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-1999-0901

18
FAUCET Score

CVE-1999-0901 describes a critical vulnerability in ypserv, specifically affecting Linux NIS implementations, where a local user can maliciously alter the GECOS and login shell information of other users. This vulnerability carries a high CVSS score of 7.2, indicating a significant risk with local access, low attack complexity, and complete compromise of confidentiality, integrity, and availability. Despite its age and severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage, suggesting it is not currently a target for attackers.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:linux-nis:ypserv:*:*:*:*:*:*:*:*

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
33.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 47th percentile among its peer group of 3,237 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

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: cbl2 ypserv 4.1-4 on CBL Mariner 2.0Fixed in: 4.1-4
microsoftpatch availablevia msrc
Product: 19249-16823Fixed in: 4.1-4

Vendor Advisories (1)

microsoft2000-Jan/CVE-1999-0901Important

ypserv allows a local user to modify the GECOS and login shells of other users.

Jan 2, 2000

References

exchange.xforce.ibmcloud.com / vulnerabilities/CVE-1999-0901