How severe is CVE-1999-0725?

CVE-1999-0725 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-1999-0725 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 25% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0725?

CVE-1999-0725 primarily affects Microsoft Internet Information Server. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0725?

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-1999-0725 published?

CVE-1999-0725 was published on 1999-08-19 and last updated on 2026-06-16.

CVE-1999-0725

CVE-1999-0725 is a high-severity vulnerability in Microsoft Internet Information Server with a CVSS 2.0 base score of 7.1. Its EPSS exploit-prediction score of 25% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-16.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 25% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Microsoft Internet Information Server
Published: 1999-08-19
Last modified: 2026-06-16

Description

When IIS is run with a default language of Chinese, Korean, or Japanese, it allows a remote attacker to view the source code of certain files, a.k.a. "Double Byte Code Page".

Frequently asked questions

What is CVE-1999-0725?: When IIS is run with a default language of Chinese, Korean, or Japanese, it allows a remote attacker to view the source code of certain files, a.k.a. "Double Byte Code Page".
How severe is CVE-1999-0725?: CVE-1999-0725 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-1999-0725 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 25% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0725?: CVE-1999-0725 primarily affects Microsoft Internet Information Server. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0725?: 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-1999-0725 published?: CVE-1999-0725 was published on 1999-08-19 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:a:microsoft:internet_information_server:3.0:*:*:ja:*:*:*:*
cpe:2.3:a:microsoft:internet_information_server:3.0:*:*:ko:*:*:*:*
cpe:2.3:a:microsoft:internet_information_server:3.0:*:*:zh:*:*:*:*
cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:ja:*:*:*:*
cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:ko:*:*:*:*
cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:zh:*:*:*:*

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