CVE-2026-42953

HIGHPre-NVD 8.48.4
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (7th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
8.4EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.4Exploit: None knownExposed services: Not assessed

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

The application contains an out-of-bounds write vulnerability that can be exploited by an attacker to cause the program to write data past the end of an allocated memory buffer. This can lead to arbitrary code execution.

CVSS v3
8.4
EG Score
8.4HIGHmedium confidence
EG Risk
38
EG Risk 38/100

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)
Severity84% × 45%
The EG Score, 8.4 of 10.
Exploitation0.2% × 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 or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
7th
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 or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the 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

July 7, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jul 7, 2026
No fix on record yet. Sources: cisa.
CISA

Labcenter Proteus 9 | CISA

https://www.cisa.gov/news-events/ics-advisories/icsa-26-188-06

Vendor Advisories for CVE-2026-42953(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 32× 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 100 of 225 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. None are among the latest 100 rows. The 125 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-12 16:06 UTCEG score recompute
  4. 2026-10-11 19:48 UTCEG score recompute
  5. 2026-10-11 17:03 UTCEG score recompute
  6. 2026-10-11 14:29 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-01 16:25 UTCEG score recompute
  18. 2026-10-01 16:25 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-09-28 13:34 UTCEG score recompute
  21. 2026-09-28 13:34 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  22. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  24. 2026-09-23 06:15 UTCEG score recompute
  25. 2026-09-23 06:15 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
Show 75 more
  1. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  2. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  3. 2026-09-18 05:48 UTCEG score recompute
  4. 2026-09-18 05:48 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  5. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  6. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  7. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  8. 2026-09-13 23:52 UTCEG score recompute
  9. 2026-09-13 23:52 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  10. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  11. 2026-09-13 08:29 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  12. 2026-09-12 16:03 UTCEG score recompute
  13. 2026-09-12 16:03 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  14. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  15. 2026-09-12 03:41 UTCEG score recompute
  16. 2026-09-12 03:41 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  17. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  18. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  19. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  20. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  21. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  22. 2026-09-06 14:07 UTCEG score recompute
  23. 2026-09-06 14:07 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  24. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  25. 2026-09-05 22:53 UTCEG score recompute
  26. 2026-09-05 22:53 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  27. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  28. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  29. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  30. 2026-08-30 20:03 UTCEG score recompute
  31. 2026-08-30 20:03 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  32. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  33. 2026-08-30 07:41 UTCEG score recompute
  34. 2026-08-30 07:41 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  35. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  36. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  37. 2026-08-27 21:54 UTCEG score recompute
  38. 2026-08-27 21:54 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  39. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  40. 2026-08-27 01:52 UTCEG score recompute
  41. 2026-08-27 01:52 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  42. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  43. 2026-08-26 12:57 UTCEG score recompute
  44. 2026-08-26 12:57 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  45. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  46. 2026-08-25 10:17 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  47. 2026-08-24 20:38 UTCEG score recompute
  48. 2026-08-24 20:38 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  49. 2026-08-24 06:58 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  50. 2026-08-23 18:35 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  51. 2026-08-23 06:14 UTCEG score recompute
  52. 2026-08-23 06:14 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  53. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  54. 2026-08-22 17:52 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  55. 2026-08-22 05:22 UTCEG score recompute
  56. 2026-08-22 05:22 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  57. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  58. 2026-08-21 17:00 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  59. 2026-08-21 04:10 UTCEG score recompute
  60. 2026-08-21 04:10 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  61. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  62. 2026-08-20 15:39 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  63. 2026-08-20 02:10 UTCEG score recompute
  64. 2026-08-20 02:10 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  65. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  66. 2026-08-19 12:30 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  67. 2026-08-18 23:21 UTCEG score recompute
  68. 2026-08-18 23:21 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  69. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  70. 2026-08-18 10:55 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  71. 2026-08-17 22:33 UTCEG score recompute
  72. 2026-08-17 22:33 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  73. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  74. 2026-08-17 09:17 UTCGHSA enrichmentGHSA-r42h-hrr3-8vrv · GitHub severity HIGH
  75. 2026-08-16 20:56 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-42953?
CVE-2026-42953 is a high-severity vulnerability; its CVE record was published on July 7, 2026. The application contains an out-of-bounds write vulnerability that can be exploited by an attacker to cause the program to write data past the end of an allocated memory buffer. This can lead to arbitrary code execution.
When was the CVE record for CVE-2026-42953 published?
The CVE record for CVE-2026-42953 was published on July 7, 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 July 9, 2026; the record at its source may have been updated since.
Is CVE-2026-42953 actively exploited?
CVE-2026-42953 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42953?
CVE-2026-42953 has a CVSS base score of 8.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-42953?
No fix for CVE-2026-42953 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-42953 are linked in the Vendor Advisories panel on this page.

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