How severe is CVE-1999-1099?

CVE-1999-1099 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-1099 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1099?

CVE-1999-1099 affects Kth Kth Kerberos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-1099?

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

When was CVE-1999-1099 published?

CVE-1999-1099 was published on 1996-11-22 and last updated on 2026-06-16.

CVE-1999-1099

CVE-1999-1099 is a medium-severity vulnerability in Kth Kth Kerberos with a CVSS 2.0 base score of 5.0. 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 5.0)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Kth Kth Kerberos
Published: 1996-11-22
Last modified: 2026-06-16

Description

Kerberos 4 allows remote attackers to obtain sensitive information via a malformed UDP packet that generates an error string that inadvertently includes the realm name and the last user.

Frequently asked questions

What is CVE-1999-1099?: Kerberos 4 allows remote attackers to obtain sensitive information via a malformed UDP packet that generates an error string that inadvertently includes the realm name and the last user.
How severe is CVE-1999-1099?: CVE-1999-1099 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-1099 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1099?: CVE-1999-1099 affects Kth Kth Kerberos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-1099?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1099 published?: CVE-1999-1099 was published on 1996-11-22 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:kth:kth_kerberos:4:*:*:*:*:*:*:*

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