How severe is CVE-1999-0398?

CVE-1999-0398 has a CVSS 2.0 base score of 4.6, rated medium severity.

Is CVE-1999-0398 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0398?

CVE-1999-0398 primarily affects Ssh. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0398?

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

When was CVE-1999-0398 published?

CVE-1999-0398 was published on 1999-01-01 and last updated on 2026-06-16.

CVE-1999-0398

CVE-1999-0398 is a medium-severity vulnerability in Ssh with a CVSS 2.0 base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.6)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ssh
Published: 1999-01-01
Last modified: 2026-06-16

Description

In some instances of SSH 1.2.27 and 2.0.11 on Linux systems, SSH will allow users with expired accounts to login.

Frequently asked questions

What is CVE-1999-0398?: In some instances of SSH 1.2.27 and 2.0.11 on Linux systems, SSH will allow users with expired accounts to login.
How severe is CVE-1999-0398?: CVE-1999-0398 has a CVSS 2.0 base score of 4.6, rated medium severity.
Is CVE-1999-0398 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0398?: CVE-1999-0398 primarily affects Ssh. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0398?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0398 published?: CVE-1999-0398 was published on 1999-01-01 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0398

Affected products (2)

cpe:2.3:a:ssh:ssh:1.2.27:*:*:*:*:*:*:*
cpe:2.3:a:ssh:ssh2:2.0.11:*:*:*:*:*:*:*

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