What’s Vulnerable › Vulnerabilities

CVE-1999-0843

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 1999-11-04 · updated 2026-06-16

Description

Denial of service in Cisco routers running NAT via a PORT command from an FTP client to a Telnet port.

Affected products

• Cisco Router: all versions

References

• https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0843
• https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0843

Get alerted when CVE-1999-0843 or the next vulnerability affects your stack