How severe is CVE-1999-1216?

CVE-1999-1216 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-1999-1216 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1216?

CVE-1999-1216 primarily affects Cisco Router. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-1216?

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-1999-1216 published?

CVE-1999-1216 was published on 1993-04-22 and last updated on 2026-06-16.

CVE-1999-1216

CVE-1999-1216 is a high-severity vulnerability in Cisco Router 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

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Router
Published: 1993-04-22
Last modified: 2026-06-16

Description

Cisco routers 9.17 and earlier allow remote attackers to bypass security restrictions via certain IP source routed packets that should normally be denied using the "no ip source-route" command.

Frequently asked questions

What is CVE-1999-1216?: Cisco routers 9.17 and earlier allow remote attackers to bypass security restrictions via certain IP source routed packets that should normally be denied using the "no ip source-route" command.
How severe is CVE-1999-1216?: CVE-1999-1216 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-1999-1216 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1216?: CVE-1999-1216 primarily affects Cisco Router. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1216?: 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-1999-1216 published?: CVE-1999-1216 was published on 1993-04-22 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:h:cisco:router:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:router:8.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:router:8.3:*:*:*:*:*:*:*
cpe:2.3:h:cisco:router:9.0:*:*:*:*:*:*:*
cpe:2.3:h:cisco:router:9.1:*:*:*:*:*:*:*

More vulnerabilities in Cisco Router

CVE-1999-0843 — Medium (CVSS 5.0): Denial of service in Cisco routers running NAT via a PORT command from an FTP client to a Telnet port.
CVE-1999-0222 — Medium (CVSS 5.0): Denial of service in Cisco IOS web server allows attackers to reboot the router using a long URL.
CVE-1999-0453 — Medium (CVSS 5.0): An attacker can identify a CISCO device by sending a SYN packet to port 1999, which is for the Cisco Discovery Protocol…

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