CVE-2018-1992

MEDIUMNVD 6.46.4—
EchelonGraph scoreMEDIUM confidence

Score 6.4 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.4Exploit: NoneExposed: 0

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

The IBM Power 9 OP910, OP920, and FW910 boot firmware's bootloader is responsible for loading and validating the initial boot firmware image that drives the rest of the system's hardware initialization. The bootloader firmware contains a buffer overflow vulnerability such that, if an attacker were able to replace the initial boot firmware image with a very carefully crafted and sufficiently large, malicious replacement, it could cause the bootloader, during the load of that image, to overwrite its own instruction memory and circumvent secure boot protections, install trojans, etc. IBM X-Force ID: 154345.

CVSS v3
6.4
EG Score
6.4(medium)
EPSS
27.4%
KEV
Not listed

Published

March 21, 2019

Last Modified

November 21, 2024

References (4)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 50× 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. 2026-07-06 16:24 UTCEPSS rescore
  2. 2026-07-06 16:24 UTCEPSS rescore
  3. 2026-07-06 02:20 UTCEPSS rescore
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  10. 2026-06-30 23:20 UTCEPSS rescore
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  12. 2026-06-29 14:03 UTCEPSS rescore
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  14. 2026-06-28 04:53 UTCEPSS rescore
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  16. 2026-06-27 03:06 UTCEPSS rescore
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  18. 2026-06-25 13:47 UTCEPSS rescore
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  1. 2026-06-21 14:54 UTCEPSS rescore
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  5. 2026-06-19 19:23 UTCEPSS rescore
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  7. 2026-06-18 17:50 UTCEPSS rescore
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  9. 2026-06-17 17:50 UTCEPSS rescore
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  11. 2026-06-16 17:50 UTCEPSS rescore
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  19. 2026-06-11 13:57 UTCEPSS rescore
  20. 2026-06-10 22:16 UTCEPSS rescore
  21. 2026-06-10 13:19 UTCEPSS rescore
  22. 2026-06-08 14:14 UTCEPSS rescore
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  24. 2026-06-07 15:22 UTCEPSS rescore
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  26. 2026-06-06 13:45 UTCEPSS rescore
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  35. 2026-05-31 22:29 UTCEPSS rescore
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  38. 2026-05-29 13:41 UTCEPSS rescore
  39. 2026-05-28 13:42 UTCEPSS rescore
  40. 2026-05-28 13:42 UTCEPSS rescore
  41. 2026-05-27 21:40 UTCEG score recompute
  42. 2026-05-27 21:40 UTCGHSA enrichment
  43. 2026-05-27 13:38 UTCEPSS rescore
  44. 2026-05-27 13:38 UTCEPSS rescore
  45. 2026-05-26 13:42 UTCEPSS rescore
  46. 2026-05-26 13:42 UTCEPSS rescore
  47. 2026-05-26 07:17 UTCEPSS rescore
  48. 2026-05-26 07:17 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2018-1992?
CVE-2018-1992 is a medium vulnerability published on March 21, 2019. The IBM Power 9 OP910, OP920, and FW910 boot firmware's bootloader is responsible for loading and validating the initial boot firmware image that drives the rest of the system's hardware initialization. The bootloader firmware contains a buffer overflow vulnerability such that, if an attacker were…
When was CVE-2018-1992 disclosed?
CVE-2018-1992 was first published in the National Vulnerability Database on March 21, 2019, 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-2018-1992 actively exploited?
CVE-2018-1992 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-1992?
CVE-2018-1992 has a CVSS v3 base score of 6.4 (NVD).
How do I remediate CVE-2018-1992?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-1992, 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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