CVE-2018-18056

MEDIUMNVD 4.64.6—
EchelonGraph scoreMEDIUM confidence

Score 4.6 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 4.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.6Exploit: None knownExposed: 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 Texas Instruments (TI) TM4C, MSP432E and MSP432P microcontroller series. The eXecute-Only-Memory (XOM) implementation prevents code read-outs on protected memory by generating bus faults. However, single-stepping and using breakpoints is allowed in XOM-protected flash memory. As a consequence, it is possible to execute single instructions with arbitrary system states (e.g., registers, status flags, and SRAM content) and observe the state changes produced by the unknown instruction. An attacker could exploit this vulnerability by executing protected and unknown instructions with specific system states and observing the state changes. Based on the gathered information, it is possible to reverse-engineer the executed instructions. The processor acts as a kind of "instruction oracle."

CVSS v3
4.6
EG Score
4.6(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity46% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

August 20, 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 7× in last 7d / 28× 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 124 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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  24. 2026-07-24 14:14 UTCEPSS rescore
  25. 2026-07-24 14:14 UTCEPSS rescore
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  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:34 UTCEG score recompute
  3. 2026-07-22 22:14 UTCEG score recompute
  4. 2026-07-22 14:05 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
  6. 2026-07-20 17:04 UTCEPSS rescore
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  8. 2026-07-19 14:28 UTCEPSS rescore
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  11. 2026-07-16 16:59 UTCEPSS rescore
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  17. 2026-07-13 22:27 UTCEPSS rescore
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  19. 2026-07-13 06:10 UTCEPSS rescore
  20. 2026-07-12 05:43 UTCEPSS rescore
  21. 2026-07-11 08:24 UTCEPSS rescore
  22. 2026-07-09 19:06 UTCEPSS rescore
  23. 2026-07-08 15:11 UTCEPSS rescore
  24. 2026-07-07 13:42 UTCEPSS rescore
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  26. 2026-07-06 16:24 UTCEPSS rescore
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  35. 2026-06-30 23:20 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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  50. 2026-06-22 14:23 UTCEPSS rescore
  51. 2026-06-21 14:54 UTCEPSS rescore
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  53. 2026-06-21 01:57 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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  66. 2026-06-13 22:58 UTCEPSS rescore
  67. 2026-06-13 22:58 UTCEPSS rescore
  68. 2026-06-12 23:09 UTCEPSS rescore
  69. 2026-06-11 13:57 UTCEPSS rescore
  70. 2026-06-10 22:16 UTCEPSS rescore
  71. 2026-06-10 13:19 UTCEPSS rescore
  72. 2026-06-08 14:14 UTCEPSS rescore
  73. 2026-06-08 14:14 UTCEPSS rescore
  74. 2026-06-07 15:22 UTCEPSS rescore
  75. 2026-06-07 15:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2018-18056?
CVE-2018-18056 is a medium vulnerability published on August 20, 2019. An issue was discovered in the Texas Instruments (TI) TM4C, MSP432E and MSP432P microcontroller series. The eXecute-Only-Memory (XOM) implementation prevents code read-outs on protected memory by generating bus faults. However, single-stepping and using breakpoints is allowed in XOM-protected flash…
When was CVE-2018-18056 disclosed?
CVE-2018-18056 was first published in the National Vulnerability Database on August 20, 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-2018-18056 actively exploited?
CVE-2018-18056 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.0% of all scored CVEs.
What is the CVSS score of CVE-2018-18056?
CVE-2018-18056 has a CVSS v3 base score of 4.6 (NVD).
How do I remediate CVE-2018-18056?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-18056, 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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