CVE-2017-14492

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because EPSS predicts 93% probability of exploitation within the next 30 days (top 0.2% of all CVEs). NVD baseline CVSS 9.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 93%
CISA-KEV: Not listedEPSS: 93%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted IPv6 router advertisement request.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
99.8%
KEV
Not listed

Published

October 3, 2017

Last Modified

May 13, 2026

Advisory Details (5)

Auto-updated Jun 21, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic
http://www.securitytracker.com/id/1039474
generic
http://www.securityfocus.com/bid/101085
generic

[SECURITY] [DSA 3989-1] dnsmasq security update

http://www.debian.org/security/2017/dsa-3989
generic
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=24036ea507862c7b7898b68289c8130f85599c10
generic🔴 Active Exploitation
http://thekelleys.org.uk/dnsmasq/CHANGELOG

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntudnsmasq-utils (2.76-5ubuntu0.1) @ zesty2026-05-20ubuntu
ubuntudnsmasq-base (2.59-4ubuntu0.3) @ precise2026-05-20ubuntu
redhatdnsmasq-0:2.76-2.el7_4.22017-10-02redhat
redhatdnsmasq-0:2.66-21.el7_3.22017-10-02redhat

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

(4)

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 0× in last 7d / 6× 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. 2026-06-27 03:05 UTCEPSS rescore
  2. 2026-06-23 21:30 UTCEPSS rescore
  3. 2026-06-19 20:52 UTCOSV refresh
  4. 2026-06-15 17:45 UTCEPSS rescore
  5. 2026-06-12 23:09 UTCEPSS rescore
  6. 2026-06-08 14:14 UTCEPSS rescore
  7. 2026-06-05 06:08 UTCEPSS rescore
  8. 2026-06-05 06:08 UTCEPSS rescore
  9. 2026-06-04 13:10 UTCEPSS rescore
  10. 2026-06-04 13:10 UTCEPSS rescore
  11. 2026-05-31 00:50 UTCOSV refresh
  12. 2026-05-29 13:41 UTCEPSS rescore
  13. 2026-05-28 13:42 UTCEPSS rescore
  14. 2026-05-28 13:42 UTCEPSS rescore
  15. 2026-05-27 13:38 UTCEPSS rescore
  16. 2026-05-27 13:38 UTCEPSS rescore
  17. 2026-05-22 21:15 UTCEPSS rescore
  18. 2026-05-22 21:15 UTCEPSS rescore
  19. 2026-05-22 21:15 UTCEPSS rescore
  20. 2026-05-20 22:37 UTCEPSS rescore
  21. 2026-05-20 22:37 UTCEPSS rescore
  22. 2026-05-20 11:21 UTCEPSS rescore
  23. 2026-05-20 11:21 UTCEPSS rescore
  24. 2026-05-20 09:52 UTCEG score recompute
  25. 2026-05-20 09:52 UTCVendor advisory
Show 27 more
  1. 2026-05-20 09:52 UTCGHSA enrichment
  2. 2026-05-20 05:39 UTCEG score recompute
  3. 2026-05-20 05:39 UTCVendor advisory
  4. 2026-05-20 05:39 UTCGHSA enrichment
  5. 2026-05-20 01:26 UTCEG score recompute
  6. 2026-05-20 01:26 UTCVendor advisory
  7. 2026-05-20 01:26 UTCGHSA enrichment
  8. 2026-05-19 21:13 UTCEG score recompute
  9. 2026-05-19 21:13 UTCVendor advisory
  10. 2026-05-19 21:13 UTCGHSA enrichment
  11. 2026-05-19 16:59 UTCEG score recompute
  12. 2026-05-19 16:59 UTCVendor advisory
  13. 2026-05-19 16:59 UTCGHSA enrichment
  14. 2026-05-19 12:46 UTCEG score recompute
  15. 2026-05-19 12:46 UTCVendor advisory
  16. 2026-05-19 12:46 UTCGHSA enrichment
  17. 2026-05-19 08:33 UTCEG score recompute
  18. 2026-05-19 08:33 UTCVendor advisory
  19. 2026-05-19 08:33 UTCGHSA enrichment
  20. 2026-05-19 04:21 UTCEG score recompute
  21. 2026-05-19 04:21 UTCVendor advisory
  22. 2026-05-19 04:20 UTCGHSA enrichment
  23. 2026-05-19 00:08 UTCEG score recompute
  24. 2026-05-19 00:08 UTCVendor advisory
  25. 2026-05-19 00:08 UTCGHSA enrichment
  26. 2026-05-18 21:30 UTCEPSS rescore
  27. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(1 reference)

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

  • Exploit-DBEDB-42942✓ verified
    First seen Oct 2, 2017

    Dnsmasq < 2.78 - Heap Overflow

    Open source ↗

Frequently asked(5)

What is CVE-2017-14492?
CVE-2017-14492 is a critical vulnerability published on October 3, 2017. Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted IPv6 router advertisement request.
When was CVE-2017-14492 disclosed?
CVE-2017-14492 was first published in the National Vulnerability Database on October 3, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-14492 actively exploited?
CVE-2017-14492 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.
What is the CVSS score of CVE-2017-14492?
CVE-2017-14492 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-14492?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-14492, 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.

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