CVE-2026-15690

LOWPre-NVD 3.13.1
EchelonGraph scoreMEDIUM confidence

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

Score 3.1 from GitHub Security Advisory (severity: LOW) published 2026-07-14. A secondary CVSS source baseline 3.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated
3.1EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 3.1Exploit: No code on recordExposed services: Not assessed

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

The CVE record's description, written by its CNA (VulDB), states the affected versions: "A vulnerability was identified in open62541 up to 1.5.5." No release containing a fix is confirmed on record.

A vulnerability was identified in open62541 up to 1.5.5. Affected by this issue is the function responseReadNamespacesArray of the file src/client/ua_client_connect.c of the component Shared Client Library. Such manipulation of the argument Server_NamespaceArray leads to null pointer dereference. The attack can be executed remotely. The attack requires a high level of complexity. The exploitation is known to be difficult. The exploit is publicly available and might be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

CVSS v3
3.1
EG Score
3.1LOWmedium confidence
EG Risk
30
EG Risk 30/100

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)
Severity31% × 45%
The EG Score, 3.1 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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 public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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
0.4%
EPSS %ILE
36th
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 public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 partial (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 14, 2026

Last Modified

July 14, 2026

References (6)

Vendor Advisories for CVE-2026-15690(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
open625411.4.11.1-1, 1.4.18-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
open625411.4.11.1-1, 1.4.18-1
  • every version on: no fix on record
—

Weakness Classification(2)

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 122 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 22 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-12 16:31 UTCEG score recompute
  4. 2026-10-11 20:09 UTCEG score recompute
  5. 2026-10-11 17:22 UTCEG score recompute
  6. 2026-10-11 14:55 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  13. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  17. 2026-10-01 13:28 UTCEG score recompute
  18. 2026-10-01 13:28 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  19. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  20. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  22. 2026-09-28 09:23 UTCEG score recompute
  23. 2026-09-28 09:23 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  24. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 35th percentile
Show 75 more
  1. 2026-09-23 03:59 UTCEG score recompute
  2. 2026-09-23 03:59 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  3. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  4. 2026-09-18 04:56 UTCEG score recompute
  5. 2026-09-18 04:56 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  6. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  7. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  8. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  9. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  10. 2026-09-12 01:47 UTCEG score recompute
  11. 2026-09-12 01:47 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  12. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-09-05 21:19 UTCEG score recompute
  19. 2026-09-05 21:19 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  20. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  24. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  25. 2026-08-30 05:25 UTCEG score recompute
  26. 2026-08-30 05:25 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  27. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  28. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  29. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  30. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  31. 2026-08-25 14:46 UTCEG score recompute
  32. 2026-08-25 14:46 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  33. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  34. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  35. 2026-08-22 14:40 UTCEG score recompute
  36. 2026-08-22 14:40 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  37. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  38. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  39. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  40. 2026-08-19 14:05 UTCEG score recompute
  41. 2026-08-19 14:05 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  42. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  43. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  44. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  45. 2026-08-16 13:49 UTCEG score recompute
  46. 2026-08-16 13:49 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  47. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  48. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  49. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  50. 2026-08-13 13:42 UTCEG score recompute
  51. 2026-08-13 13:42 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  52. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  53. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  54. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  55. 2026-08-10 13:35 UTCEG score recompute
  56. 2026-08-10 13:35 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  57. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  58. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  59. 2026-08-07 13:29 UTCEG score recompute
  60. 2026-08-07 13:29 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  61. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  62. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  63. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  64. 2026-08-04 13:23 UTCEG score recompute
  65. 2026-08-04 13:23 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  66. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  67. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  68. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  69. 2026-08-01 12:02 UTCEG score recompute
  70. 2026-08-01 12:02 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  71. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  72. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  73. 2026-07-29 11:56 UTCEG score recompute
  74. 2026-07-29 11:56 UTCGHSA enrichmentGHSA-cfxc-8gpx-qrvw · GitHub severity LOW · GitHub CVSS 3.1
  75. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.3% · 18th percentile

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Frequently asked(5)

What is CVE-2026-15690?
CVE-2026-15690 is a low-severity vulnerability; its CVE record was published on July 14, 2026. A vulnerability was identified in open62541 up to 1.5.5. Affected by this issue is the function responseReadNamespacesArray of the file src/client/uaclientconnect.c of the component Shared Client Library. Such manipulation of the argument Server_NamespaceArray leads to null pointer dereference. The…
When was the CVE record for CVE-2026-15690 published?
The CVE record for CVE-2026-15690 was published on July 14, 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 14, 2026; the record at its source may have been updated since.
Is CVE-2026-15690 actively exploited?
CVE-2026-15690 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15690?
CVE-2026-15690 has a CVSS base score of 3.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-15690?
No fix for CVE-2026-15690 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 CVE record's description, written by its CNA (VulDB), states the affected versions: "A vulnerability was identified in open62541 up to 1.5.5." No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-15690 are linked in the Vendor Advisories panel on this page.

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