How severe is CVE-1999-0258?

CVE-1999-0258 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0258 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0258?

CVE-1999-0258 primarily affects Microsoft Windows 95. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0258?

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

When was CVE-1999-0258 published?

CVE-1999-0258 was published on 1998-02-13 and last updated on 2026-06-16.

CVE-1999-0258

CVE-1999-0258 is a medium-severity vulnerability in Microsoft Windows 95 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: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows 95
Published: 1998-02-13
Last modified: 2026-06-16

Description

Bonk variation of teardrop IP fragmentation denial of service.

Frequently asked questions

What is CVE-1999-0258?: Bonk variation of teardrop IP fragmentation denial of service.
How severe is CVE-1999-0258?: CVE-1999-0258 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-0258 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0258?: CVE-1999-0258 primarily affects Microsoft Windows 95. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0258?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0258 published?: CVE-1999-0258 was published on 1998-02-13 and last updated on 2026-06-16.

References

https://marc.info/?l=ntbugtraq&m=88901842000424&w=2

Affected products (2)

cpe:2.3:o:microsoft:windows_95:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*

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