How severe is CVE-1999-1558?

CVE-1999-1558 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-1999-1558 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1558?

CVE-1999-1558 primarily affects Digital Digital Openvms. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-1558?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-1999-1558 published?

CVE-1999-1558 was published on 1998-07-16 and last updated on 2026-06-16.

CVE-1999-1558

CVE-1999-1558 is a high-severity vulnerability in Digital Digital Openvms with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Digital Digital Openvms
Published: 1998-07-16
Last modified: 2026-06-16

Description

Vulnerability in loginout in Digital OpenVMS 7.1 and earlier allows unauthorized access when external authentication is enabled.

Frequently asked questions

What is CVE-1999-1558?: Vulnerability in loginout in Digital OpenVMS 7.1 and earlier allows unauthorized access when external authentication is enabled.
How severe is CVE-1999-1558?: CVE-1999-1558 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-1999-1558 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1558?: CVE-1999-1558 primarily affects Digital Digital Openvms. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1558?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-1999-1558 published?: CVE-1999-1558 was published on 1998-07-16 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:digital:digital_openvms:7.1:*:*:*:*:*:*:*
cpe:2.3:a:digital:digital_openvms_axp:7.1:*:*:*:*:*:*:*