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CVE-2001-0509

21
FAUCET Score

CVE-2001-0509 describes a denial-of-service vulnerability affecting RPC servers in Microsoft Exchange Server 2000 and earlier, Microsoft SQL Server 2000 and earlier, Windows NT 4.0, and Windows 2000. Attackers can exploit this flaw remotely by sending malformed inputs, leading to service disruption. Rated as Medium severity (CVSS 5.0), it has a low attack complexity and requires no authentication, but only impacts availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
5.0CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:5.0:-:*:*:*:*:*:*
5.5CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:5.5:-:*:*:*:*:*:*
2000CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2000:-:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:microsoft:sql_server:7.0:-:*:*:*:*:*:*
2000CPE matchmatch criteria
cpe:2.3:a:microsoft:sql_server:2000:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
16.98%
Probability of exploitation in next 30 days
EPSS Percentile
96.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1698 is in the 96th percentile among its peer group of 23,705 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2001/ms01-041
PatchVendor Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A82
Third Party Advisory