CVE-2018-8065

HIGHNVD 7.58.8▲
EchelonGraph scoreHIGH confidence

Score elevated to 8.8 because EPSS predicts 76% probability of exploitation within the next 30 days (top 0.5% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
8.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 76%
  • Public exploit code is available (Metasploit, epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 76%CVSS: 7.5Exploit: Metasploit · epss top5pct · epss high · public exploitExposed: 0

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

An issue was discovered in the web server in Flexense SyncBreeze Enterprise 10.6.24. There is a user mode write access violation on the syncbrs.exe memory region that can be triggered by rapidly sending a variety of HTTP requests with long HTTP header values or long URIs.

CVSS v3
7.5
EG Score
8.8(high)
EG Risk
75(Track)
EG Risk 75/100SSVC: 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
Severity88% × 45%
Exploitation76% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
76%
EPSS %ILE
99%
KEV
Not listed

Published

March 12, 2018

Last Modified

November 21, 2024

References (6)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 2× in last 7d / 15× 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. 2026-09-06 13:44 UTCEPSS rescore
  2. 2026-09-04 13:56 UTCEPSS rescore
  3. 2026-08-30 19:13 UTCEPSS rescore
  4. 2026-08-30 01:18 UTCEPSS rescore
  5. 2026-08-28 21:36 UTCEPSS rescore
  6. 2026-08-26 14:42 UTCEPSS rescore
  7. 2026-08-25 13:45 UTCEPSS rescore
  8. 2026-08-24 14:11 UTCEPSS rescore
  9. 2026-08-21 23:45 UTCEPSS rescore
  10. 2026-08-20 22:51 UTCEPSS rescore
  11. 2026-08-19 17:00 UTCEPSS rescore
  12. 2026-08-18 13:44 UTCEPSS rescore
  13. 2026-08-16 02:10 UTCEPSS rescore
  14. 2026-08-13 21:56 UTCEPSS rescore
  15. 2026-08-12 13:47 UTCEPSS rescore
  16. 2026-08-08 16:32 UTCEPSS rescore
  17. 2026-08-07 16:23 UTCEPSS rescore
  18. 2026-08-06 13:42 UTCEPSS rescore
  19. 2026-08-04 15:05 UTCEPSS rescore
  20. 2026-07-30 16:24 UTCEPSS rescore
  21. 2026-07-28 15:32 UTCEPSS rescore
  22. 2026-07-26 14:51 UTCEPSS rescore
  23. 2026-07-24 14:14 UTCEPSS rescore
  24. 2026-07-24 14:14 UTCEPSS rescore
  25. 2026-07-23 01:37 UTCEG score recompute▲ 1.30
Show 60 more
  1. 2026-07-22 22:17 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
  3. 2026-07-20 17:04 UTCEPSS rescore
  4. 2026-07-20 17:04 UTCEPSS rescore
  5. 2026-07-19 14:28 UTCEPSS rescore
  6. 2026-07-19 14:28 UTCEPSS rescore
  7. 2026-07-15 16:55 UTCEPSS rescore
  8. 2026-07-13 06:10 UTCEPSS rescore
  9. 2026-07-08 15:11 UTCEPSS rescore
  10. 2026-07-08 15:11 UTCEPSS rescore
  11. 2026-07-05 02:27 UTCEPSS rescore
  12. 2026-06-30 23:20 UTCEPSS rescore
  13. 2026-06-30 23:20 UTCEPSS rescore
  14. 2026-06-29 14:03 UTCEPSS rescore
  15. 2026-06-28 04:53 UTCEPSS rescore
  16. 2026-06-28 04:53 UTCEPSS rescore
  17. 2026-06-27 03:06 UTCEPSS rescore
  18. 2026-06-27 03:06 UTCEPSS rescore
  19. 2026-06-25 13:47 UTCEPSS rescore
  20. 2026-06-25 13:47 UTCEPSS rescore
  21. 2026-06-24 14:02 UTCEPSS rescore
  22. 2026-06-24 14:02 UTCEPSS rescore
  23. 2026-06-23 21:30 UTCEPSS rescore
  24. 2026-06-23 21:30 UTCEPSS rescore
  25. 2026-06-22 14:23 UTCEPSS rescore
  26. 2026-06-22 14:23 UTCEPSS rescore
  27. 2026-06-21 14:54 UTCEPSS rescore
  28. 2026-06-21 14:54 UTCEPSS rescore
  29. 2026-06-21 01:57 UTCEPSS rescore
  30. 2026-06-21 01:57 UTCEPSS rescore
  31. 2026-06-18 17:50 UTCEPSS rescore
  32. 2026-06-18 17:50 UTCEPSS rescore
  33. 2026-06-16 17:50 UTCEPSS rescore
  34. 2026-06-16 17:50 UTCEPSS rescore
  35. 2026-06-15 17:45 UTCEPSS rescore
  36. 2026-06-13 22:58 UTCEPSS rescore
  37. 2026-06-12 23:09 UTCEPSS rescore
  38. 2026-06-12 23:09 UTCEPSS rescore
  39. 2026-06-10 22:16 UTCEPSS rescore
  40. 2026-06-10 13:19 UTCEPSS rescore
  41. 2026-06-08 14:14 UTCEPSS rescore
  42. 2026-06-07 15:22 UTCEPSS rescore
  43. 2026-06-07 15:22 UTCEPSS rescore
  44. 2026-06-06 13:45 UTCEPSS rescore
  45. 2026-06-06 13:45 UTCEPSS rescore
  46. 2026-06-05 22:45 UTCEPSS rescore
  47. 2026-06-05 22:45 UTCEPSS rescore
  48. 2026-06-05 06:08 UTCEPSS rescore
  49. 2026-06-05 06:08 UTCEPSS rescore
  50. 2026-06-02 20:11 UTCEPSS rescore
  51. 2026-06-01 13:50 UTCEPSS rescore
  52. 2026-05-31 00:14 UTCEPSS rescore
  53. 2026-05-31 00:14 UTCEPSS rescore
  54. 2026-05-29 13:41 UTCEPSS rescore
  55. 2026-05-28 13:43 UTCEPSS rescore
  56. 2026-05-28 13:42 UTCEPSS rescore
  57. 2026-05-28 10:37 UTCEG score recompute
  58. 2026-05-28 10:37 UTCGHSA enrichment
  59. 2026-05-26 07:17 UTCEPSS rescore
  60. 2026-05-26 07:17 UTCEPSS rescore

Publicly available exploits

(3 references)

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

  • Exploit-DBEDB-51493
    First seen May 31, 2023

    Flexense HTTP Server 10.6.24 - Buffer Overflow (DoS) (Metasploit)

    Open source ↗
  • GitHub PoCEgeBalci/CVE-2018-8065
    First seen May 25, 2018

    Flexense HTTP Server <= 10.6.24 - Denial Of Service Exploit

    Open source ↗
  • Metasploitauxiliary/dos/http/flexense_http_server_dos✓ verified
    First seen Mar 9, 2018

    Flexense HTTP Server Denial Of Service

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2018-8065?
CVE-2018-8065 is a high vulnerability published on March 12, 2018. An issue was discovered in the web server in Flexense SyncBreeze Enterprise 10.6.24. There is a user mode write access violation on the syncbrs.exe memory region that can be triggered by rapidly sending a variety of HTTP requests with long HTTP header values or long URIs.
When was CVE-2018-8065 disclosed?
CVE-2018-8065 was first published in the National Vulnerability Database on March 12, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-8065 actively exploited?
CVE-2018-8065 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 76% probability of exploitation in the next 30 days, which ranks it in the top 0.5% of all scored CVEs.
What is the CVSS score of CVE-2018-8065?
CVE-2018-8065 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.8.
How do I remediate CVE-2018-8065?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-8065, 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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