How severe is CVE-1999-0990?

CVE-1999-0990 has a CVSS 2.0 base score of 2.1, rated low severity.

Is CVE-1999-0990 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0990?

CVE-1999-0990 affects Gnome Gdm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0990?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-0990 published?

CVE-1999-0990 was published on 1999-12-05 and last updated on 2026-06-16.

CVE-1999-0990

CVE-1999-0990 is a low-severity vulnerability in Gnome Gdm with a CVSS 2.0 base score of 2.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 2.0 base score 2.1)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Gnome Gdm
Published: 1999-12-05
Last modified: 2026-06-16

Description

Error messages generated by gdm with the VerboseAuth setting allows an attacker to identify valid users on a system.

Frequently asked questions

What is CVE-1999-0990?: Error messages generated by gdm with the VerboseAuth setting allows an attacker to identify valid users on a system.
How severe is CVE-1999-0990?: CVE-1999-0990 has a CVSS 2.0 base score of 2.1, rated low severity.
Is CVE-1999-0990 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0990?: CVE-1999-0990 affects Gnome Gdm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0990?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0990 published?: CVE-1999-0990 was published on 1999-12-05 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0990

Affected products (1)

cpe:2.3:a:gnome:gdm:2.0_beta4:*:*:*:*:*:*:*

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