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CVE-1999-1558

19
FAUCET Score

CVE-1999-1558 describes a vulnerability in the loginout utility of Digital OpenVMS 7.1 and earlier, specifically impacting digital_openvms and digital_openvms_axp, which allows unauthorized access when external authentication is enabled. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network (AV:N/AC:L/Au:N) and could lead to full compromise of confidentiality, integrity, and availability (C:P/I:P/A:P). Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this legacy vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
7.1CPE matchmatch criteria
cpe:2.3:a:digital:digital_openvms:7.1:*:*:*:*:*:*:*
7.1CPE matchmatch criteria
cpe:2.3:a:digital:digital_openvms_axp:7.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.37%
Probability of exploitation in next 30 days
EPSS Percentile
69.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0137 is in the 50th 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

ciac.llnl.gov / ciac/bulletins/i-071a.shtml
PatchVendor Advisory
iss.net / security_center/static/7151.php
securityfocus.com / bid/161
PatchVendor Advisory