What’s Vulnerable › Vulnerabilities

CVE-1999-0775

• Severity: critical (CVSS 10.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 1999-06-10 · updated 2026-06-16

Description

Cisco Gigabit Switch routers running IOS allow remote attackers to forward unauthorized packets due to improper handling of the "established" keyword in an access list.

Affected products

• Cisco IOS: 11.2(14)gs2, 11.2(15)g

References

• https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0775
• https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0775

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