How severe is CVE-1999-1254?

CVE-1999-1254 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-1254 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1254?

CVE-1999-1254 primarily affects Microsoft Windows 95. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-1254?

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

When was CVE-1999-1254 published?

CVE-1999-1254 was published on 1999-03-08 and last updated on 2026-06-16.

CVE-1999-1254

CVE-1999-1254 is a medium-severity vulnerability in Microsoft Windows 95 with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows 95
Published: 1999-03-08
Last modified: 2026-06-16

Description

Windows 95, 98, and NT 4.0 allow remote attackers to cause a denial of service by spoofing ICMP redirect messages from a router, which causes Windows to change its routing tables.

Frequently asked questions

What is CVE-1999-1254?: Windows 95, 98, and NT 4.0 allow remote attackers to cause a denial of service by spoofing ICMP redirect messages from a router, which causes Windows to change its routing tables.
How severe is CVE-1999-1254?: CVE-1999-1254 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-1254 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1254?: CVE-1999-1254 primarily affects Microsoft Windows 95. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1254?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1254 published?: CVE-1999-1254 was published on 1999-03-08 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:o:microsoft:windows_95:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_98:*:gold:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*

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