CVE-2026-0438

MEDIUMNVD 5.45.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.1% (2nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
5.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.4Exploit: None knownExposed services: Not assessed

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

A System Management Mode (SMM) handler could perform a callout to code located in non-SMM/untrusted memory. A highly privileged attacker could, with active user interaction and under high complexity and present preconditions, trigger execution of attacker-controlled code in SMM, potentially compromising the system’s confidentiality, integrity, and availability.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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 (value × EchelonGraph’s weight)
Severity54% × 45%
The EG Score, 5.4 of 10.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines, and watch for a fix.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines, and watch for a fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 15, 2026

Last Modified

May 15, 2026

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 23× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 218 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 119 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 20:17 UTCEG score recompute
  2. 2026-10-11 18:29 UTCEG score recompute
  3. 2026-10-11 15:03 UTCEG score recompute
  4. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
Show 74 more
  1. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-08-23 17:33 UTCEG score recompute
  15. 2026-08-23 17:33 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  16. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-08-22 01:36 UTCEG score recompute
  18. 2026-08-22 01:36 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  19. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-08-20 19:29 UTCEG score recompute
  22. 2026-08-20 19:29 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  23. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-08-17 10:18 UTCEG score recompute
  26. 2026-08-17 10:18 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  27. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  28. 2026-08-16 03:51 UTCEG score recompute
  29. 2026-08-16 03:51 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  30. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  31. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  32. 2026-08-14 02:21 UTCEG score recompute
  33. 2026-08-14 02:21 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  34. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  35. 2026-08-12 14:56 UTCEG score recompute
  36. 2026-08-12 14:56 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  37. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  38. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  39. 2026-08-11 09:16 UTCEG score recompute
  40. 2026-08-11 09:15 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  41. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  42. 2026-08-10 07:16 UTCEG score recompute
  43. 2026-08-10 07:16 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  44. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  45. 2026-08-09 05:17 UTCEG score recompute
  46. 2026-08-09 05:17 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  47. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  48. 2026-08-08 03:17 UTCEG score recompute
  49. 2026-08-08 03:17 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  50. 2026-08-07 01:18 UTCEG score recompute
  51. 2026-08-07 01:18 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  52. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  53. 2026-08-05 21:32 UTCEG score recompute
  54. 2026-08-05 21:32 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  55. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  56. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  57. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  58. 2026-08-03 23:01 UTCEG score recompute
  59. 2026-08-03 23:01 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  60. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  61. 2026-08-02 21:02 UTCEG score recompute
  62. 2026-08-02 21:02 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  63. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  64. 2026-08-01 19:03 UTCEG score recompute
  65. 2026-08-01 19:03 UTCGHSA enrichmentGHSA-783m-hm3h-gh75
  66. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  67. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  68. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  69. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  70. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  71. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  72. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  73. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  74. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.1% · 3rd percentile

Frequently asked(5)

What is CVE-2026-0438?
CVE-2026-0438 is a medium-severity vulnerability; its CVE record was published on May 15, 2026. A System Management Mode (SMM) handler could perform a callout to code located in non-SMM/untrusted memory. A highly privileged attacker could, with active user interaction and under high complexity and present preconditions, trigger execution of attacker-controlled code in SMM, potentially…
When was the CVE record for CVE-2026-0438 published?
The CVE record for CVE-2026-0438 was published on May 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of May 15, 2026; the record at its source may have been updated since.
Is CVE-2026-0438 actively exploited?
CVE-2026-0438 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-0438?
CVE-2026-0438 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-0438?
No fix for CVE-2026-0438 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix.

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