CVE-1999-0909

Multihomed Windows systems allow a remote attacker to bypass IP source routing restrictions via a malformed packet with IP options, aka the "Spoofed Route Pointer" vulnerability.

Published: 1999-09-20 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-1999-0909 is rated High Risk (68.5/100): CVSS High severity, with high exploitation likelihood (EPSS 12.01%, 96th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +7.73% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize 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-1999-0909

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 2026-06-15 4.28% 12.01% +7.73%
2 2025-10-24 4.23% 4.28% +0.05%
3 2025-05-28 — 4.23% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-1999-0909

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-1999-0909

Affected software / configurations for CVE-1999-0909

Vendor Product Version Raw CPE
microsoft terminal_server — cpe:2.3:a:microsoft:terminal_server:*:*:*:*:*:*:*:*
microsoft windows_95 0a cpe:2.3:o:microsoft:windows_95:0a:*:*:*:*:*:*:*
microsoft windows_95 0b cpe:2.3:o:microsoft:windows_95:0b:*:*:*:*:*:*:*
microsoft windows_98se — cpe:2.3:o:microsoft:windows_98se:*:*:*:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp1:*:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp2:*:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp3:*:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp4:*:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:sp5:*:*:*:*:*:*

References for CVE-1999-0909

cvelogic Threat Intelligence