CVE-2026-33391

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

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

Score 5.4 from GitHub Security Advisory published 2026-09-08. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
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: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

Upgrade to v26.3.0 or later (from the CVE record's solution, Nozomi Networks Inc.) — apply it.

An access control vulnerability was discovered in the Smart Polling configuration functionality due to insufficient validation of user privileges. An authenticated user with limited privileges can remotely bypass the intended access control of the web management interface and modify the Smart Polling discovery configuration. This allows the attacker to disrupt the visibility of assets in the monitored network.

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.
Exploitation0.3% × 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 every mission impact level.
Exploitation none (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: Upgrade to v26.3.0 or later (from the CVE record's solution, Nozomi Networks Inc.). Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
25th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

Upgrade to v26.3.0 or later (from the CVE record's solution, Nozomi Networks Inc.). Apply it within your standard update timelines.

Exploitation none (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

September 8, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 8, 2026
Fix named in the CVE record's solution (Nozomi Networks Inc.).
Web page

NN-2026:17-01 - Incorrect authorization in Smart Polling configuration in Guardian/CMC before 26.3.0 - CVE-2026-33391 | Product Security Incident Response Portal

https://security.nozominetworks.com/NN-2026:17-01

Vendor Advisories for CVE-2026-33391(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 18× in last 7d / 79× 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.

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 97 is merged into the row it repeats.

  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  2. 2026-10-12 16:13 UTCEG score recompute
  3. 2026-10-11 19:55 UTCEG score recompute
  4. 2026-10-11 16:49 UTCEG score recompute
  5. 2026-10-11 16:49 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  6. 2026-10-11 14:36 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  9. 2026-10-09 22:35 UTCEG score recompute
  10. 2026-10-09 22:35 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  12. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  13. 2026-10-08 08:51 UTCEG score recompute
  14. 2026-10-08 08:51 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  15. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-10-07 08:33 UTCEG score recompute
  17. 2026-10-07 08:33 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  18. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  19. 2026-10-06 07:55 UTCEG score recompute
  20. 2026-10-06 07:55 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  21. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  22. 2026-10-05 07:38 UTCEG score recompute
  23. 2026-10-05 07:38 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  24. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-10-04 07:20 UTCEG score recompute
Show 71 more
  1. 2026-10-04 07:20 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  2. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-03 07:02 UTCEG score recompute
  4. 2026-10-03 07:02 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  5. 2026-10-02 06:43 UTCEG score recompute
  6. 2026-10-02 06:43 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  7. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  8. 2026-10-01 06:25 UTCEG score recompute
  9. 2026-10-01 06:25 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  10. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  11. 2026-09-30 06:08 UTCEG score recompute
  12. 2026-09-30 06:08 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  13. 2026-09-29 05:49 UTCEG score recompute
  14. 2026-09-29 05:49 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  15. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-09-28 05:31 UTCEG score recompute
  17. 2026-09-28 05:31 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  19. 2026-09-27 05:14 UTCEG score recompute
  20. 2026-09-27 05:14 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  22. 2026-09-26 04:46 UTCEG score recompute
  23. 2026-09-26 04:46 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  24. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  25. 2026-09-25 04:12 UTCEG score recompute
  26. 2026-09-25 04:12 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  27. 2026-09-24 03:54 UTCEG score recompute
  28. 2026-09-24 03:54 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  29. 2026-09-23 03:29 UTCEG score recompute
  30. 2026-09-23 03:29 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  31. 2026-09-22 03:11 UTCEG score recompute
  32. 2026-09-22 03:11 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  33. 2026-09-21 02:52 UTCEG score recompute
  34. 2026-09-21 02:52 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  35. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  36. 2026-09-20 02:34 UTCEG score recompute
  37. 2026-09-20 02:34 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  38. 2026-09-19 02:17 UTCEG score recompute
  39. 2026-09-19 02:17 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  40. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  41. 2026-09-18 01:59 UTCEG score recompute
  42. 2026-09-18 01:59 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  43. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  44. 2026-09-17 01:41 UTCEG score recompute
  45. 2026-09-17 01:41 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  46. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  47. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  48. 2026-09-16 01:23 UTCEG score recompute
  49. 2026-09-16 01:23 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  50. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  51. 2026-09-15 01:05 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  52. 2026-09-14 00:47 UTCEG score recompute
  53. 2026-09-14 00:47 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  54. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  55. 2026-09-13 00:29 UTCEG score recompute
  56. 2026-09-13 00:29 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  57. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  58. 2026-09-12 00:10 UTCEG score recompute
  59. 2026-09-12 00:10 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  60. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  61. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  62. 2026-09-10 23:50 UTCEG score recompute
  63. 2026-09-10 23:50 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  64. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  65. 2026-09-09 23:09 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  66. 2026-09-08 19:49 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  67. 2026-09-08 15:35 UTCEG score recompute
  68. 2026-09-08 15:35 UTCGHSA enrichmentGHSA-jx7f-4jrv-rjh9 · GitHub CVSS 5.4
  69. 2026-09-08 14:29 UTCEG score recompute
  70. 2026-09-08 14:08 UTCEG score recomputeFirst assessed: 5.4 MEDIUM
  71. 2026-09-08 14:04 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-33391?
CVE-2026-33391 is a medium-severity vulnerability; its CVE record was published on September 8, 2026. An access control vulnerability was discovered in the Smart Polling configuration functionality due to insufficient validation of user privileges. An authenticated user with limited privileges can remotely bypass the intended access control of the web management interface and modify the Smart…
When was CVE-2026-33391 made public?
CVE-2026-33391 was made public on September 8, 2026: that is the date its CVE record's CNA, Nozomi Networks Inc., gives for when the vulnerability was made public. The CVE record itself was published on September 8, 2026. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-33391 actively exploited?
CVE-2026-33391 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33391?
CVE-2026-33391 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-33391?
The CVE record's solution for CVE-2026-33391, written by its CNA Nozomi Networks Inc., names the fix: "Upgrade to v26.3.0 or later." The vendor advisories EchelonGraph has for CVE-2026-33391 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-33391

Explore →

Is Your Infrastructure Affected by CVE-2026-33391?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs