CVE-1999-0861

Race condition in the SSL ISAPI filter in IIS and other servers may leak information in plaintext.

Published: 1999-08-11 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-1999-0861 is rated Moderate Risk (43.2/100): CVSS Low severity, with medium exploitation likelihood (EPSS 5.46%). EPSS rose +1.59% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-1999-0861

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 3.86% 5.46% +1.59%
2 2025-03-29 5.46% 3.86% -1.59%
3 2025-03-19 — 5.46% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-1999-0861

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.6 2.0 LOW
AV:N/AC:H/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 4.9 2.9 [email protected]

Weakness enumeration for CVE-1999-0861

Affected software / configurations for CVE-1999-0861

Vendor Product Version Raw CPE
microsoft commercial_internet_system 2.0 cpe:2.3:a:microsoft:commercial_internet_system:2.0:*:*:*:*:*:*:*
microsoft commercial_internet_system 2.5 cpe:2.3:a:microsoft:commercial_internet_system:2.5:*:*:*:*:*:*:*
microsoft internet_information_server 4.0 cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:*:*:*:*:*
microsoft site_server 3.0 cpe:2.3:a:microsoft:site_server:3.0:*:*:*:*:*:*:*
microsoft site_server_commerce 3.0 cpe:2.3:a:microsoft:site_server_commerce:3.0:*:*:*:*:*:*:*

References for CVE-1999-0861

cvelogic Threat Intelligence