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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 2.0
- 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 1.35% probability · 71th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- cisco/pix private link
- Source
- cve@mitre.org
EPSS 1.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://ciac.llnl.gov/ciac/bulletins/i-056.shtml
- http://www.cisco.com/warp/public/770/pixkey-pub.shtmlPatch, Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/1579
- http://ciac.llnl.gov/ciac/bulletins/i-056.shtml
- http://www.cisco.com/warp/public/770/pixkey-pub.shtmlPatch, Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/1579
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.