CVE-2001-0414

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 92% probability of exploitation within the next 30 days (top 0.2% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Trending — 3 sources updated this weekWeaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 92%
CISA-KEV: Not listedEPSS: 92%CVSS: —Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.8%
KEV
Not listed

Published

June 18, 2001

Last Modified

June 16, 2026

References (48)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpatch2001-04-05redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 3× in last 7d / 8× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 21:21 UTCEG score recompute▲ 9.00
  2. 2026-07-22 21:21 UTCVendor advisory
  3. 2026-07-22 21:21 UTCGHSA enrichment
  4. 2026-07-15 16:53 UTCEPSS rescore
  5. 2026-06-29 14:02 UTCEPSS rescore
  6. 2026-06-28 14:02 UTCEPSS rescore
  7. 2026-06-24 14:01 UTCEPSS rescore
  8. 2026-06-23 21:29 UTCEPSS rescore
  9. 2026-06-16 17:49 UTCEPSS rescore
  10. 2026-06-12 23:07 UTCEPSS rescore
  11. 2026-06-11 13:55 UTCEPSS rescore
  12. 2026-06-10 22:13 UTCEPSS rescore
  13. 2026-06-08 14:13 UTCEPSS rescore
  14. 2026-06-07 15:21 UTCEPSS rescore
  15. 2026-06-06 13:44 UTCEPSS rescore
  16. 2026-06-05 06:07 UTCEPSS rescore
  17. 2026-06-04 13:09 UTCEPSS rescore
  18. 2026-06-02 20:10 UTCEPSS rescore
  19. 2026-06-01 13:48 UTCEPSS rescore
  20. 2026-05-31 22:27 UTCEPSS rescore
  21. 2026-05-31 20:38 UTCEG score recompute
  22. 2026-05-31 20:38 UTCVendor advisory
  23. 2026-05-31 20:38 UTCGHSA enrichment
  24. 2026-05-31 00:13 UTCEPSS rescore
  25. 2026-05-31 00:13 UTCEPSS rescore
Show 7 more
  1. 2026-05-27 13:37 UTCEPSS rescore
  2. 2026-05-27 13:37 UTCEPSS rescore
  3. 2026-05-24 16:42 UTCEPSS rescore
  4. 2026-05-22 21:15 UTCEPSS rescore
  5. 2026-05-20 22:36 UTCEPSS rescore
  6. 2026-05-18 21:29 UTCEPSS rescore
  7. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-16285✓ verified
    First seen Aug 25, 2010

    NTP daemon readvar - Remote Buffer Overflow (Metasploit)

    Open source ↗
  • Exploit-DBEDB-20727✓ verified
    First seen Apr 4, 2001

    NTPd - Remote Buffer Overflow

    Open source ↗
  • Exploit-DBEDB-9940✓ verified
    First seen Apr 4, 2001

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

    Open source ↗
  • Metasploitexploit/multi/ntp/ntp_overflow✓ verified
    First seen Apr 4, 2001

    NTP Daemon readvar Buffer Overflow

    Open source ↗

Frequently asked(4)

What is CVE-2001-0414?
CVE-2001-0414 is a none vulnerability published on June 18, 2001. 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.
When was CVE-2001-0414 disclosed?
CVE-2001-0414 was first published in the National Vulnerability Database on June 18, 2001, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2001-0414 actively exploited?
CVE-2001-0414 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2001-0414?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2001-0414, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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