How severe is CVE-2001-0414?

No CVSS score has been assigned to CVE-2001-0414 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2001-0414?

Affected package information for CVE-2001-0414 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2001-0414?

No fixed release is recorded for CVE-2001-0414 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

How do I detect CVE-2001-0414 in my code and dependencies?

Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

How do I mitigate CVE-2001-0414 if there is no patch (or I can't update yet)?

Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Is CVE-2001-0414 actively exploited in the wild?

Yes. There are 5 known exploit references for CVE-2001-0414, including 3 documented proof-of-concept exploits on Exploit-DB and 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2001-0414?

CVE-2001-0414 has an EPSS (Exploit Prediction Scoring System) score of 91.9%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

When was CVE-2001-0414 published, and has it been updated?

CVE-2001-0414 was published on September 18, 2001 and was last updated on August 8, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

Not in CISA KEV

CVE-2001-0414 — Red Hat

CVE-2001-0414 is a remote code execution vulnerability. 5 public exploit references exist, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

Buffer overflow in ntpd ntp daemon 4.0.99k and earlier (aka xntpd and xntp3) allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long readvar argument.

Published

Sep 18, 2001

Updated

Aug 8, 2024

Affected

2 products

Patched

See advisory

Exploits

5 known

Exploitation data as of Oct 28, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

91.9%probability of exploitation in next 30 days

Very High Risk+0.27%

Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Description

Buffer overflow in ntpd ntp daemon 4.0.99k and earlier (aka xntpd and xntp3) allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long readvar argument.

Affected Products

2 products · 18 configurations

Application

ntpddave_mills

≤ 4.0.99k

11 versions

4.0.994.0.99a4.0.99b4.0.99c4.0.99d4.0.99e4.0.99f4.0.99g4.0.99h4.0.99i4.0.99j

Application

xntp3dave_mills

6 versions

5.935.93a5.93b5.93c5.93d5.93e

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-16285remotelinux✓ Verified

NTP daemon readvar - Remote Buffer Overflow (Metasploit)

by Metasploit · Aug 25, 2010

Exploit-DB Source

EDB-9940remotelinux✓ Verified

NTPd 4.0.99j-k readvar - Remote Buffer Overflow (Metasploit)

by patrick · Apr 4, 2001

Exploit-DB Source

EDB-20727remotelinux✓ Verified

NTPd - Remote Buffer Overflow

by babcia padlina ltd · Apr 4, 2001

Exploit-DB Source

Detection & mitigation playbook

Vulnerability

Detect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2001-0414 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red Hat

RHSA-2001:045Red Hat Linux 5.2

Frequently Asked Questions

Buffer overflow in ntpd ntp daemon 4.0.99k and earlier (aka xntpd and xntp3) allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long readvar argument.

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CVE-2001-0414 — Red Hat

EPSS Exploitation Probability

Description

Affected Products

Detection & mitigation playbook

Detect

Remediation status

Mitigate without a patch

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2001-0414 in your dependencies?