CVE-2017-14493

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 84%
  • Public exploit code is available (Exploit-DB (verified), epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 84%CVSS: 9.8Exploit: Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 0

A fix is available — apply it.

Stack-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 DHCPv6 request.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
82(Track*)
EG Risk 82/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation84% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
84%
EPSS %ILE
100%
KEV
Not listed

Published

October 3, 2017

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Sep 8, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

CVE-2017-14491 - PSIRT.COM

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=3d4ff1ba8419546490b464418223132529514033
generic🔴 Active Exploitation
http://thekelleys.org.uk/dnsmasq/CHANGELOG
generic
http://www.securitytracker.com/id/1039474

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntudnsmasq-utils (2.75-1ubuntu0.16.04.3) @ xenial2026-05-20ubuntu
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.

Affected Packages

(28 across 28 ecosystems)
Alpine:v3.10(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.14(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.3(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.76-r1—
Alpine:v3.4(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.76-r1—
Alpine:v3.5(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.76-r2—
Alpine:v3.6(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.76-r5—
Alpine:v3.7(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.8(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Alpine:v3.9(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.78-1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
dnsmasq2.72-3, 2.72-3+deb8u12.72-3+deb8u2—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
dnsmasq2.76-52.76-5+deb9u1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

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 2× in last 7d / 13× 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. 2026-09-04 05:01 UTCEPSS rescore
  2. 2026-09-02 14:07 UTCEPSS rescore
  3. 2026-08-30 19:13 UTCEPSS rescore
  4. 2026-08-28 21:36 UTCEPSS rescore
  5. 2026-08-26 16:46 UTCOSV refresh
  6. 2026-08-26 14:41 UTCEPSS rescore
  7. 2026-08-25 13:44 UTCEPSS rescore
  8. 2026-08-24 14:10 UTCEPSS rescore
  9. 2026-08-20 22:50 UTCEPSS rescore
  10. 2026-08-19 16:59 UTCEPSS rescore
  11. 2026-08-16 02:10 UTCEPSS rescore
  12. 2026-08-15 01:26 UTCEPSS rescore
  13. 2026-08-10 06:40 UTCOSV refresh
  14. 2026-08-07 16:22 UTCEPSS rescore
  15. 2026-08-05 19:12 UTCEPSS rescore
  16. 2026-08-02 02:23 UTCEPSS rescore
  17. 2026-07-30 16:24 UTCEPSS rescore
  18. 2026-07-30 01:26 UTCEPSS rescore
  19. 2026-07-26 14:51 UTCEPSS rescore
  20. 2026-07-25 07:11 UTCOSV refresh
  21. 2026-07-23 01:27 UTCEG score recompute
  22. 2026-07-22 22:06 UTCEG score recompute
  23. 2026-07-22 14:04 UTCEPSS rescore
  24. 2026-07-20 17:04 UTCEPSS rescore
  25. 2026-07-20 17:04 UTCEPSS rescore
Show 74 more
  1. 2026-07-16 16:59 UTCEPSS rescore
  2. 2026-07-16 16:59 UTCEPSS rescore
  3. 2026-07-15 16:54 UTCEPSS rescore
  4. 2026-07-15 16:54 UTCEPSS rescore
  5. 2026-07-11 08:24 UTCEPSS rescore
  6. 2026-07-08 02:05 UTCOSV refresh
  7. 2026-07-07 13:42 UTCEPSS rescore
  8. 2026-07-06 02:20 UTCEPSS rescore
  9. 2026-07-05 02:27 UTCEPSS rescore
  10. 2026-07-01 15:02 UTCEPSS rescore
  11. 2026-07-01 15:02 UTCEPSS rescore
  12. 2026-06-28 04:53 UTCEPSS rescore
  13. 2026-06-25 13:47 UTCEPSS rescore
  14. 2026-06-25 13:47 UTCEPSS rescore
  15. 2026-06-23 21:30 UTCEPSS rescore
  16. 2026-06-19 13:55 UTCOSV refresh
  17. 2026-06-17 17:50 UTCEPSS rescore
  18. 2026-06-15 17:45 UTCEPSS rescore
  19. 2026-06-13 22:57 UTCEPSS rescore
  20. 2026-06-12 23:09 UTCEPSS rescore
  21. 2026-06-11 13:57 UTCEPSS rescore
  22. 2026-06-10 22:15 UTCEPSS rescore
  23. 2026-06-08 14:14 UTCEPSS rescore
  24. 2026-06-07 15:22 UTCEPSS rescore
  25. 2026-06-07 15:22 UTCEPSS rescore
  26. 2026-06-06 13:45 UTCEPSS rescore
  27. 2026-06-06 13:45 UTCEPSS rescore
  28. 2026-06-05 22:44 UTCEPSS rescore
  29. 2026-06-05 06:08 UTCEPSS rescore
  30. 2026-06-05 06:08 UTCEPSS rescore
  31. 2026-06-04 13:10 UTCEPSS rescore
  32. 2026-06-04 13:10 UTCEPSS rescore
  33. 2026-06-02 20:11 UTCEPSS rescore
  34. 2026-06-02 20:11 UTCEPSS rescore
  35. 2026-05-31 22:28 UTCEPSS rescore
  36. 2026-05-31 00:14 UTCEPSS rescore
  37. 2026-05-30 21:23 UTCOSV refresh
  38. 2026-05-29 13:41 UTCEPSS rescore
  39. 2026-05-28 13:42 UTCEPSS rescore
  40. 2026-05-28 13:42 UTCEPSS rescore
  41. 2026-05-27 13:38 UTCEPSS rescore
  42. 2026-05-27 13:38 UTCEPSS rescore
  43. 2026-05-26 13:42 UTCEPSS rescore
  44. 2026-05-26 13:42 UTCEPSS rescore
  45. 2026-05-26 07:17 UTCEPSS rescore
  46. 2026-05-26 07:17 UTCEPSS rescore
  47. 2026-05-22 21:15 UTCEPSS rescore
  48. 2026-05-22 21:15 UTCEPSS rescore
  49. 2026-05-22 21:15 UTCEPSS rescore
  50. 2026-05-20 22:37 UTCEPSS rescore
  51. 2026-05-20 22:37 UTCEPSS rescore
  52. 2026-05-20 11:21 UTCEPSS rescore
  53. 2026-05-20 11:21 UTCEPSS rescore
  54. 2026-05-20 08:34 UTCVendor advisory
  55. 2026-05-20 08:34 UTCGHSA enrichment
  56. 2026-05-20 04:31 UTCVendor advisory
  57. 2026-05-20 04:31 UTCGHSA enrichment
  58. 2026-05-20 00:27 UTCVendor advisory
  59. 2026-05-20 00:27 UTCGHSA enrichment
  60. 2026-05-19 20:24 UTCVendor advisory
  61. 2026-05-19 20:24 UTCGHSA enrichment
  62. 2026-05-19 16:21 UTCVendor advisory
  63. 2026-05-19 16:21 UTCGHSA enrichment
  64. 2026-05-19 12:18 UTCVendor advisory
  65. 2026-05-19 12:18 UTCGHSA enrichment
  66. 2026-05-19 08:15 UTCVendor advisory
  67. 2026-05-19 08:15 UTCGHSA enrichment
  68. 2026-05-19 04:13 UTCVendor advisory
  69. 2026-05-19 04:13 UTCGHSA enrichment
  70. 2026-05-19 00:10 UTCEG score recompute
  71. 2026-05-19 00:10 UTCVendor advisory
  72. 2026-05-19 00:10 UTCGHSA enrichment
  73. 2026-05-18 21:30 UTCEPSS rescore
  74. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(2 references)

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

  • GitHub PoCpupiles/bof-dnsmasq-cve-2017-14493
    First seen Dec 4, 2018

    dnsmasq rop exploit with NX bypass

    Open source ↗
  • Exploit-DBEDB-42943✓ verified
    First seen Oct 2, 2017

    Dnsmasq < 2.78 - Stack Overflow

    Open source ↗

Frequently asked(5)

What is CVE-2017-14493?
CVE-2017-14493 is a critical vulnerability published on October 3, 2017. Stack-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 DHCPv6 request.
When was CVE-2017-14493 disclosed?
CVE-2017-14493 was first published in the National Vulnerability Database on October 3, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-14493 actively exploited?
CVE-2017-14493 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84% probability of exploitation in the next 30 days, which ranks it in the top 0.3% of all scored CVEs.
What is the CVSS score of CVE-2017-14493?
CVE-2017-14493 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-14493?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-14493, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2017-14493

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