CVE-1999-1100

CVE-1999-1100 is a high-severity vulnerability in Cisco Pix Private Link 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

Description

Cisco PIX Private Link 4.1.6 and earlier does not properly process certain commands in the configuration file, which reduces the effective key length of the DES key to 48 bits instead of 56 bits, which makes it easier for an attacker to find the proper key via a brute force attack.

Frequently asked questions

What is CVE-1999-1100?
Cisco PIX Private Link 4.1.6 and earlier does not properly process certain commands in the configuration file, which reduces the effective key length of the DES key to 48 bits instead of 56 bits, which makes it easier for an attacker to find the proper key via a brute force attack.
How severe is CVE-1999-1100?
CVE-1999-1100 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-1999-1100 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1100?
CVE-1999-1100 affects Cisco Pix Private Link. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-1100?
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-1999-1100 published?
CVE-1999-1100 was published on 1999-12-31 and last updated on 2026-06-16.

References

Affected products (1)