CVE-2018-6855

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.8Exploit: None knownExposed: 0

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

Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via IOCTL 0x80202014. By crafting an input buffer we can control the execution path to the point where the constant 0xFFFFFFF will be written to a user-controlled address. We can take advantage of this condition to modify the SEP_TOKEN_PRIVILEGES structure of the Token object belonging to the exploit process and grant SE_DEBUG_NAME privilege. This allows the exploit process to interact with higher privileged processes running as SYSTEM and execute code in their security context.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

July 9, 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 7× in last 7d / 31× 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 122 total refreshes for this CVE.

  1. 2026-08-20 22:51 UTCEPSS rescore
  2. 2026-08-19 17:00 UTCEPSS rescore
  3. 2026-08-18 13:44 UTCEPSS rescore
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  1. 2026-07-24 14:14 UTCEPSS rescore
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  5. 2026-07-23 01:37 UTCEG score recompute
  6. 2026-07-22 22:17 UTCEG score recompute
  7. 2026-07-22 14:05 UTCEPSS rescore
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  19. 2026-07-13 22:27 UTCEPSS rescore
  20. 2026-07-13 06:10 UTCEPSS rescore
  21. 2026-07-12 05:43 UTCEPSS rescore
  22. 2026-07-09 19:06 UTCEPSS rescore
  23. 2026-07-08 15:11 UTCEPSS rescore
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  25. 2026-07-07 13:42 UTCEPSS rescore
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  27. 2026-07-06 16:25 UTCEPSS rescore
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  35. 2026-06-30 23:20 UTCEPSS rescore
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  41. 2026-06-27 03:06 UTCEPSS rescore
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  43. 2026-06-25 13:47 UTCEPSS rescore
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  45. 2026-06-24 14:02 UTCEPSS rescore
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  47. 2026-06-23 21:30 UTCEPSS rescore
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  49. 2026-06-22 14:23 UTCEPSS rescore
  50. 2026-06-22 14:23 UTCEPSS rescore
  51. 2026-06-21 14:54 UTCEPSS rescore
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  55. 2026-06-19 19:23 UTCEPSS rescore
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  57. 2026-06-18 17:50 UTCEPSS rescore
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  60. 2026-06-16 17:50 UTCEPSS rescore
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  63. 2026-06-14 23:15 UTCEPSS rescore
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  65. 2026-06-13 22:58 UTCEPSS rescore
  66. 2026-06-12 23:09 UTCEPSS rescore
  67. 2026-06-12 23:09 UTCEPSS rescore
  68. 2026-06-11 13:57 UTCEPSS rescore
  69. 2026-06-10 22:16 UTCEPSS rescore
  70. 2026-06-10 13:19 UTCEPSS rescore
  71. 2026-06-08 14:14 UTCEPSS rescore
  72. 2026-06-07 15:22 UTCEPSS rescore
  73. 2026-06-07 15:22 UTCEPSS rescore
  74. 2026-06-06 13:45 UTCEPSS rescore
  75. 2026-06-06 13:45 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2018-6855?
CVE-2018-6855 is a high vulnerability published on July 9, 2018. Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via IOCTL 0x80202014. By crafting an input buffer we can control the execution path to the point where the constant 0xFFFFFFF will be written…
When was CVE-2018-6855 disclosed?
CVE-2018-6855 was first published in the National Vulnerability Database on July 9, 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-2018-6855 actively exploited?
CVE-2018-6855 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.6% of all scored CVEs.
What is the CVSS score of CVE-2018-6855?
CVE-2018-6855 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2018-6855?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-6855, 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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