How severe is CVE-1999-1266?

CVE-1999-1266 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-1266 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-1999-1266?

CVE-1999-1266 affects Metamail Corporation Metamail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-1266?

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

When was CVE-1999-1266 published?

CVE-1999-1266 was published on 1997-06-13 and last updated on 2026-06-16.

CVE-1999-1266

CVE-1999-1266 is a medium-severity vulnerability in Metamail Corporation Metamail 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: Metamail Corporation Metamail
Published: 1997-06-13
Last modified: 2026-06-16

Description

rsh daemon (rshd) generates different error messages when a valid username is provided versus an invalid name, which allows remote attackers to determine valid users on the system.

Frequently asked questions

What is CVE-1999-1266?: rsh daemon (rshd) generates different error messages when a valid username is provided versus an invalid name, which allows remote attackers to determine valid users on the system.
How severe is CVE-1999-1266?: CVE-1999-1266 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-1266 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-1999-1266?: CVE-1999-1266 affects Metamail Corporation Metamail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-1266?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1266 published?: CVE-1999-1266 was published on 1997-06-13 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:metamail_corporation:metamail:*:*:*:*:*:*:*:*

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