CVE-2016-9400

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. 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: 4%CVSS: 9.8Exploit: NoneExposed: 0

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

The CClient::ProcessServerPacket method in engine/client/client.cpp in Teeworlds before 0.6.4 allows remote servers to write to arbitrary physical memory locations and possibly execute arbitrary code via vectors involving snap handling.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
88.4%
KEV
Not listed

Published

February 22, 2017

Last Modified

May 13, 2026

Advisory Details (7)

Auto-updated Jun 22, 2026
Patch available. Sources: github_commit.
generic
http://www.securityfocus.com/bid/94381
generic

oss-security - Re: CVE Request: teeworlds: possible remote code execution on teeworlds client

http://www.openwall.com/lists/oss-security/2016/11/17/8
generic

oss-security - CVE Request: teeworlds: possible remote code execution on teeworlds client

http://www.openwall.com/lists/oss-security/2016/11/16/8
generic

Teeworlds

https://www.teeworlds.com/?page=news&id=12086
generic

Teeworlds: Remote execution of arbitrary code on client (GLSA 201705-13) — Gentoo security

https://security.gentoo.org/glsa/201705-13
generic

[SECURITY] Fedora 23 Update: teeworlds-0.6.4-1.fc23 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C4JNSBXXPE7O32ZMFK7D7YL6EKLG7PRV/
github_commit Patch Available

commit ff254722a268 (teeworlds/teeworlds)

Patch available: teeworlds/teeworlds 0.6.4-release (contains commit ff254722a268)

https://github.com/teeworlds/teeworlds/commit/ff254722a2683867fcb3e67569ffd36226c4bc62

Data Freshness Timeline

(refreshed 12× in last 7d / 41× 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 105 total refreshes for this CVE.

  1. 2026-07-24 14:13 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:24 UTCEG score recompute
  4. 2026-07-22 22:04 UTCEG score recompute
  5. 2026-07-22 14:04 UTCEPSS rescore
  6. 2026-07-21 15:21 UTCEPSS rescore
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  8. 2026-07-20 17:04 UTCEPSS rescore
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  11. 2026-07-19 02:26 UTCEPSS rescore
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  13. 2026-07-18 10:00 UTCEPSS rescore
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  15. 2026-07-16 16:59 UTCEPSS rescore
  16. 2026-07-16 16:59 UTCEPSS rescore
  17. 2026-07-15 16:54 UTCEPSS rescore
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  19. 2026-07-15 01:56 UTCEPSS rescore
  20. 2026-07-13 22:26 UTCEPSS rescore
  21. 2026-07-12 05:43 UTCEPSS rescore
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  23. 2026-07-11 08:24 UTCEPSS rescore
  24. 2026-07-09 19:06 UTCEPSS rescore
  25. 2026-07-08 15:10 UTCEPSS rescore
Show 75 more
  1. 2026-07-08 07:57 UTCOSV refresh
  2. 2026-07-07 13:42 UTCEPSS rescore
  3. 2026-07-06 16:24 UTCEPSS rescore
  4. 2026-07-06 16:24 UTCEPSS rescore
  5. 2026-07-06 02:20 UTCEPSS rescore
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  7. 2026-07-05 02:27 UTCEPSS rescore
  8. 2026-07-04 06:28 UTCEPSS rescore
  9. 2026-07-01 15:02 UTCEPSS rescore
  10. 2026-06-30 23:19 UTCEPSS rescore
  11. 2026-06-30 23:19 UTCEPSS rescore
  12. 2026-06-29 14:03 UTCEPSS rescore
  13. 2026-06-28 14:04 UTCEPSS rescore
  14. 2026-06-28 04:53 UTCEPSS rescore
  15. 2026-06-27 03:05 UTCEPSS rescore
  16. 2026-06-25 13:47 UTCEPSS rescore
  17. 2026-06-24 14:02 UTCEPSS rescore
  18. 2026-06-23 21:30 UTCEPSS rescore
  19. 2026-06-21 14:54 UTCEPSS rescore
  20. 2026-06-21 14:54 UTCEPSS rescore
  21. 2026-06-21 01:57 UTCEPSS rescore
  22. 2026-06-21 01:57 UTCEPSS rescore
  23. 2026-06-19 19:35 UTCOSV refresh
  24. 2026-06-19 19:23 UTCEPSS rescore
  25. 2026-06-19 19:23 UTCEPSS rescore
  26. 2026-06-18 17:50 UTCEPSS rescore
  27. 2026-06-18 17:50 UTCEPSS rescore
  28. 2026-06-17 17:50 UTCEPSS rescore
  29. 2026-06-17 17:50 UTCEPSS rescore
  30. 2026-06-16 17:50 UTCEPSS rescore
  31. 2026-06-15 17:45 UTCEPSS rescore
  32. 2026-06-14 23:14 UTCEPSS rescore
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  35. 2026-06-13 22:57 UTCEPSS rescore
  36. 2026-06-12 23:09 UTCEPSS rescore
  37. 2026-06-11 13:57 UTCEPSS rescore
  38. 2026-06-08 14:14 UTCEPSS rescore
  39. 2026-06-07 15:22 UTCEPSS rescore
  40. 2026-06-07 15:22 UTCEPSS rescore
  41. 2026-06-06 13:45 UTCEPSS rescore
  42. 2026-06-06 13:45 UTCEPSS rescore
  43. 2026-06-05 22:44 UTCEPSS rescore
  44. 2026-06-05 06:08 UTCEPSS rescore
  45. 2026-06-05 06:08 UTCEPSS rescore
  46. 2026-06-04 13:10 UTCEPSS rescore
  47. 2026-06-04 13:10 UTCEPSS rescore
  48. 2026-06-02 20:10 UTCEPSS rescore
  49. 2026-05-31 22:28 UTCEPSS rescore
  50. 2026-05-31 22:28 UTCEPSS rescore
  51. 2026-05-31 00:14 UTCEPSS rescore
  52. 2026-05-31 00:13 UTCOSV refresh
  53. 2026-05-29 13:41 UTCEPSS rescore
  54. 2026-05-28 13:42 UTCEPSS rescore
  55. 2026-05-28 13:42 UTCEPSS rescore
  56. 2026-05-27 13:38 UTCEPSS rescore
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  60. 2026-05-26 07:17 UTCEPSS rescore
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  63. 2026-05-20 22:37 UTCEPSS rescore
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  66. 2026-05-20 11:21 UTCEPSS rescore
  67. 2026-05-20 11:21 UTCEPSS rescore
  68. 2026-05-20 09:34 UTCGHSA enrichment
  69. 2026-05-20 05:51 UTCGHSA enrichment
  70. 2026-05-20 02:08 UTCGHSA enrichment
  71. 2026-05-19 22:25 UTCGHSA enrichment
  72. 2026-05-19 18:42 UTCGHSA enrichment
  73. 2026-05-19 14:59 UTCGHSA enrichment
  74. 2026-05-19 11:15 UTCGHSA enrichment
  75. 2026-05-19 07:25 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2016-9400?
CVE-2016-9400 is a critical vulnerability published on February 22, 2017. The CClient::ProcessServerPacket method in engine/client/client.cpp in Teeworlds before 0.6.4 allows remote servers to write to arbitrary physical memory locations and possibly execute arbitrary code via vectors involving snap handling.
When was CVE-2016-9400 disclosed?
CVE-2016-9400 was first published in the National Vulnerability Database on February 22, 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-2016-9400 actively exploited?
CVE-2016-9400 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-9400?
CVE-2016-9400 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-9400?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-9400, 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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