CVE-2017-5469

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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 5%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Fixed potential buffer overflows in generated Firefox code due to CVE-2016-6354 issue in Flex. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
90.6%
KEV
Not listed

Published

June 11, 2018

Last Modified

November 25, 2025

Advisory Details (10)

Auto-updated Jun 22, 2026
Patch available. Sources: redhat.
generic

Security vulnerabilities fixed in Firefox ESR 52.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2017-12/
generic

Security vulnerabilities fixed in Firefox ESR 45.9 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2017-11/
generic

Security vulnerabilities fixed in Firefox 53 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2017-10/
generic

[SECURITY] [DSA 3831-1] firefox-esr security update

https://www.debian.org/security/2017/dsa-3831
generic

1292534 - (CVE-2017-5469) flex: buffer overflow in generated code

https://bugzilla.mozilla.org/show_bug.cgi?id=1292534
redhat Patch Available

Affected: Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2017:1201
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2017:1106
redhat Patch Available

Affected: Red Hat Enterprise Linux 6.

https://access.redhat.com/errata/RHSA-2017:1104
generic
http://www.securitytracker.com/id/1038320
generic
http://www.securityfocus.com/bid/97940

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuthunderbird (1:52.1.1+build1-0ubuntu0.17.04.1) @ zesty2026-05-28ubuntu
ubuntufirefox (53.0+build6-0ubuntu0.16.10.1) @ yakkety2026-05-28ubuntu
redhatthunderbird-0:52.1.0-1.el7_32017-05-08redhat
redhatfirefox-0:52.1.0-2.el7_32017-04-21redhat
redhatfirefox-0:52.1.0-2.el6_92017-04-20redhat

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.

Weakness Classification(1)

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

All Vendor Advisories

(5)

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 12× in last 7d / 40× 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. 2026-07-07 13:42 UTCEPSS rescore
  2. 2026-07-06 16:24 UTCEPSS rescore
  3. 2026-07-06 16:24 UTCEPSS rescore
  4. 2026-07-06 02:20 UTCEPSS rescore
  5. 2026-07-06 02:20 UTCEPSS rescore
  6. 2026-07-05 02:27 UTCEPSS rescore
  7. 2026-07-04 06:56 UTCOSV refresh
  8. 2026-07-04 06:28 UTCEPSS rescore
  9. 2026-07-02 16:54 UTCEPSS rescore
  10. 2026-07-01 15:02 UTCEPSS rescore
  11. 2026-06-30 23:19 UTCEPSS rescore
  12. 2026-06-30 23:19 UTCEPSS rescore
  13. 2026-06-29 14:03 UTCEPSS rescore
  14. 2026-06-28 14:04 UTCEPSS rescore
  15. 2026-06-28 04:53 UTCEPSS rescore
  16. 2026-06-27 03:06 UTCEPSS rescore
  17. 2026-06-27 03:05 UTCEPSS rescore
  18. 2026-06-25 13:47 UTCEPSS rescore
  19. 2026-06-24 14:02 UTCEPSS rescore
  20. 2026-06-24 14:02 UTCEPSS rescore
  21. 2026-06-23 21:30 UTCEPSS rescore
  22. 2026-06-21 14:54 UTCEPSS rescore
  23. 2026-06-21 14:54 UTCEPSS rescore
  24. 2026-06-21 01:57 UTCEPSS rescore
  25. 2026-06-21 01:57 UTCEPSS rescore
Show 40 more
  1. 2026-06-19 19:23 UTCEPSS rescore
  2. 2026-06-19 19:23 UTCEPSS rescore
  3. 2026-06-18 17:50 UTCEPSS rescore
  4. 2026-06-17 17:50 UTCEPSS rescore
  5. 2026-06-16 17:50 UTCEPSS rescore
  6. 2026-06-16 17:50 UTCEPSS rescore
  7. 2026-06-15 18:13 UTCOSV refresh
  8. 2026-06-15 17:45 UTCEPSS rescore
  9. 2026-06-14 23:14 UTCEPSS rescore
  10. 2026-06-13 22:57 UTCEPSS rescore
  11. 2026-06-12 23:09 UTCEPSS rescore
  12. 2026-06-10 22:15 UTCEPSS rescore
  13. 2026-06-10 13:19 UTCEPSS rescore
  14. 2026-06-08 14:14 UTCEPSS rescore
  15. 2026-06-08 14:14 UTCEPSS rescore
  16. 2026-06-06 13:45 UTCEPSS rescore
  17. 2026-06-06 13:45 UTCEPSS rescore
  18. 2026-06-05 22:44 UTCEPSS rescore
  19. 2026-06-05 06:08 UTCEPSS rescore
  20. 2026-06-05 06:08 UTCEPSS rescore
  21. 2026-06-04 13:10 UTCEPSS rescore
  22. 2026-06-02 20:11 UTCEPSS rescore
  23. 2026-06-02 20:11 UTCEPSS rescore
  24. 2026-05-31 22:28 UTCEPSS rescore
  25. 2026-05-31 22:28 UTCEPSS rescore
  26. 2026-05-31 00:14 UTCEPSS rescore
  27. 2026-05-31 00:14 UTCEPSS rescore
  28. 2026-05-29 13:41 UTCEPSS rescore
  29. 2026-05-28 13:42 UTCEPSS rescore
  30. 2026-05-28 13:42 UTCEPSS rescore
  31. 2026-05-28 06:54 UTCEG score recompute
  32. 2026-05-28 06:54 UTCVendor advisory
  33. 2026-05-28 06:54 UTCGHSA enrichment
  34. 2026-05-27 13:38 UTCEPSS rescore
  35. 2026-05-27 13:38 UTCEPSS rescore
  36. 2026-05-26 13:42 UTCEPSS rescore
  37. 2026-05-26 13:42 UTCEPSS rescore
  38. 2026-05-26 07:17 UTCEPSS rescore
  39. 2026-05-26 07:17 UTCEPSS rescore
  40. 2026-05-25 12:46 UTCOSV refresh

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2017-5469?
CVE-2017-5469 is a critical vulnerability published on June 11, 2018. Fixed potential buffer overflows in generated Firefox code due to CVE-2016-6354 issue in Flex. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.
When was CVE-2017-5469 disclosed?
CVE-2017-5469 was first published in the National Vulnerability Database on June 11, 2018, with the most recent update on November 25, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-5469 actively exploited?
CVE-2017-5469 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-5469?
CVE-2017-5469 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-5469?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-5469, 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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