CVE-1999-0909

Terminal Server vulnerability

CVSS

7.5

EPSS

12.0%

EPSS pct

96th

Exploited

No known

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.

Affected vendor

Microsoft

Affected product

Terminal Server

CVSS vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Weakness type (CWE)

CWE-264 — Permissions, Privileges, and Access Controls

Published

1999-09-20

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 12.0% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-1999-0909

Confirm whether Microsoft Terminal Server is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-1999-0909.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-1999-0909

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