CVE-2001-0543

Exchange Server vulnerability

CVSS

5.0

EPSS

18.8%

EPSS pct

97th

Exploited

No known

Memory leak in NNTP service in Windows NT 4.0 and Windows 2000 allows remote attackers to cause a denial of service (memory exhaustion) via a large number of malformed posts.

Affected vendor

Microsoft

Affected product

Exchange Server

CVSS vector

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

Weakness type (CWE)

CWE-401 — Missing Release of Memory (Memory Leak)

Published

2001-09-20

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 availability.

Its EPSS score of 18.8% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2001-0543

Confirm whether Microsoft Exchange Server is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2001-0543.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2001-0543

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2001-0543 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2001-0543?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2001-0543.

Start free scan

No credit card. Agentless.

Related vulnerabilities

Policykit vulnerability

MEDIUM

CVE-2011-1910

Bind vulnerability