How severe is CVE-1999-0230?

CVE-1999-0230 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0230 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0230?

CVE-1999-0230 primarily affects Cisco Ios. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0230?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-0230 published?

CVE-1999-0230 was published on 1997-12-15 and last updated on 2026-06-16.

CVE-1999-0230

CVE-1999-0230 is a medium-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Ios
Published: 1997-12-15
Last modified: 2026-06-16

Description

Buffer overflow in Cisco 7xx routers through the telnet service.

Frequently asked questions

What is CVE-1999-0230?: Buffer overflow in Cisco 7xx routers through the telnet service.
How severe is CVE-1999-0230?: CVE-1999-0230 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-0230 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0230?: CVE-1999-0230 primarily affects Cisco Ios. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0230?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0230 published?: CVE-1999-0230 was published on 1997-12-15 and last updated on 2026-06-16.

References

http://www.osvdb.org/1102

Affected products (3)

cpe:2.3:o:cisco:ios:4.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:4.1.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:4.1.2:*:*:*:*:*:*:*

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