CVE-2016-2334

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 15%CVSS: 7.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Heap-based buffer overflow in the NArchive::NHfs::CHandler::ExtractZlibFile method in 7zip before 16.00 and p7zip allows remote attackers to execute arbitrary code via a crafted HFS+ image.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity78% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
15%
EPSS %ILE
97%
KEV
Not listed

Published

December 13, 2016

Last Modified

June 17, 2026

Advisory Details (6)

Auto-updated Sep 23, 2026
No patch confirmed yet.
generic

7-Zip: Multiple vulnerabilities (GLSA 201701-27) — Gentoo security

https://security.gentoo.org/glsa/201701-27
generic

[SECURITY] Fedora 24 Update: p7zip-16.02-1.fc24 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DTGWICT3KYYDPDXRNO5SXD32GZICGRIR/
generic

[SECURITY] Fedora 23 Update: p7zip-16.02-1.fc23 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DNYIQAU3FKFBNFPK6GKYTSVRHQA7PTYT/
generic

TALOS-2016-0093 || Cisco Talos Intelligence Group - Comprehensive Threat Intelligence

http://www.talosintel.com/reports/TALOS-2016-0093/
generic

CVE-2016-2335 - PSIRT.COM

http://www.securityfocus.com/bid/90531
generic

Vulnerability Walkthrough: 7zip CVE-2016-2334 HFS+ Code Execution Vulnerability

http://blog.talosintelligence.com/2017/11/exploiting-cve-2016-2334.html

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
p7zip—15.14.1+dfsg-2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
p7zip—15.14.1+dfsg-2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
p7zip—15.14.1+dfsg-2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 17× 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.

Showing the most recent 100 of 135 total refreshes for this CVE.

  1. 2026-09-24 13:59 UTCEPSS rescore
  2. 2026-09-23 13:41 UTCEPSS rescore
  3. 2026-09-19 15:35 UTCEPSS rescore
  4. 2026-09-18 19:22 UTCEPSS rescore
  5. 2026-09-18 18:06 UTCOSV refresh
  6. 2026-09-17 19:21 UTCEPSS rescore
  7. 2026-09-15 03:05 UTCEPSS rescore
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  10. 2026-09-07 15:56 UTCEPSS rescore
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  13. 2026-09-01 03:31 UTCEPSS rescore
  14. 2026-08-30 21:04 UTCOSV refresh
  15. 2026-08-30 19:12 UTCEPSS rescore
  16. 2026-08-27 14:20 UTCEPSS rescore
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  1. 2026-08-15 01:25 UTCEPSS rescore
  2. 2026-08-14 08:16 UTCOSV refresh
  3. 2026-08-12 13:46 UTCEPSS rescore
  4. 2026-08-11 13:36 UTCEPSS rescore
  5. 2026-08-09 13:42 UTCEPSS rescore
  6. 2026-08-08 16:32 UTCEPSS rescore
  7. 2026-08-06 13:42 UTCEPSS rescore
  8. 2026-08-05 19:12 UTCEPSS rescore
  9. 2026-08-04 15:04 UTCEPSS rescore
  10. 2026-08-01 04:11 UTCEPSS rescore
  11. 2026-07-30 16:23 UTCEPSS rescore
  12. 2026-07-29 16:07 UTCOSV refresh
  13. 2026-07-28 15:31 UTCEPSS rescore
  14. 2026-07-26 14:50 UTCEPSS rescore
  15. 2026-07-25 14:13 UTCEPSS rescore
  16. 2026-07-23 14:14 UTCEPSS rescore
  17. 2026-07-23 01:22 UTCEG score recompute
  18. 2026-07-22 22:01 UTCEG score recompute
  19. 2026-07-22 14:04 UTCEPSS rescore
  20. 2026-07-21 15:21 UTCEPSS rescore
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  22. 2026-07-20 17:03 UTCEPSS rescore
  23. 2026-07-19 14:27 UTCEPSS rescore
  24. 2026-07-19 02:26 UTCEPSS rescore
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  26. 2026-07-18 10:00 UTCEPSS rescore
  27. 2026-07-18 10:00 UTCEPSS rescore
  28. 2026-07-16 16:59 UTCEPSS rescore
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  30. 2026-07-15 16:54 UTCEPSS rescore
  31. 2026-07-15 16:54 UTCEPSS rescore
  32. 2026-07-15 01:56 UTCEPSS rescore
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  34. 2026-07-13 22:26 UTCEPSS rescore
  35. 2026-07-13 06:09 UTCEPSS rescore
  36. 2026-07-12 05:43 UTCEPSS rescore
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  38. 2026-07-12 05:39 UTCOSV refresh
  39. 2026-07-11 08:23 UTCEPSS rescore
  40. 2026-07-09 19:05 UTCEPSS rescore
  41. 2026-07-08 15:10 UTCEPSS rescore
  42. 2026-07-07 13:42 UTCEPSS rescore
  43. 2026-07-05 02:27 UTCEPSS rescore
  44. 2026-07-04 06:28 UTCEPSS rescore
  45. 2026-07-01 15:02 UTCEPSS rescore
  46. 2026-06-29 14:03 UTCEPSS rescore
  47. 2026-06-28 14:04 UTCEPSS rescore
  48. 2026-06-28 04:53 UTCEPSS rescore
  49. 2026-06-27 03:05 UTCEPSS rescore
  50. 2026-06-27 03:05 UTCEPSS rescore
  51. 2026-06-25 13:47 UTCEPSS rescore
  52. 2026-06-25 13:47 UTCEPSS rescore
  53. 2026-06-24 14:02 UTCEPSS rescore
  54. 2026-06-24 14:02 UTCEPSS rescore
  55. 2026-06-23 21:30 UTCEPSS rescore
  56. 2026-06-23 11:58 UTCOSV refresh
  57. 2026-06-21 01:57 UTCEPSS rescore
  58. 2026-06-21 01:57 UTCEPSS rescore
  59. 2026-06-19 19:23 UTCEPSS rescore
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  61. 2026-06-18 17:50 UTCEPSS rescore
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  64. 2026-06-16 17:50 UTCEPSS rescore
  65. 2026-06-16 17:50 UTCEPSS rescore
  66. 2026-06-15 17:45 UTCEPSS rescore
  67. 2026-06-14 23:14 UTCEPSS rescore
  68. 2026-06-13 22:57 UTCEPSS rescore
  69. 2026-06-13 22:57 UTCEPSS rescore
  70. 2026-06-12 23:09 UTCEPSS rescore
  71. 2026-06-12 23:09 UTCEPSS rescore
  72. 2026-06-11 13:57 UTCEPSS rescore
  73. 2026-06-10 22:15 UTCEPSS rescore
  74. 2026-06-10 13:18 UTCEPSS rescore
  75. 2026-06-07 15:22 UTCEPSS rescore

Publicly available exploits

(1 reference)

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

  • GitHub PoCicewall/CVE-2016-2334
    First seen Nov 27, 2017

    Exploiting CVE-2016-2334 7zip HFS+ vulnerability

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2016-2334?
CVE-2016-2334 is a high vulnerability published on December 13, 2016. Heap-based buffer overflow in the NArchive::NHfs::CHandler::ExtractZlibFile method in 7zip before 16.00 and p7zip allows remote attackers to execute arbitrary code via a crafted HFS+ image.
When was CVE-2016-2334 disclosed?
CVE-2016-2334 was first published in the National Vulnerability Database on December 13, 2016, 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-2016-2334 actively exploited?
CVE-2016-2334 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15% probability of exploitation in the next 30 days, which ranks it in the top 3.4% of all scored CVEs.
What is the CVSS score of CVE-2016-2334?
CVE-2016-2334 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2016-2334?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-2334, 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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