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".
https://exchange.xforce.ibmcloud.com/vulnerabilities/2302
https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-022
http://www.securityfocus.com/bid/477
http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ233335
Source: Mitre, NVD
Published: 1999-08-19
Updated: 2026-06-16
Base Score: 7.1
Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:N/A:N
Severity: High
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.24852