CVE-2026-20071

LOWPre-NVD 3.83.8
EchelonGraph scoreMEDIUM confidence

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

Score 3.8 from GitHub Security Advisory (severity: LOW) published 2026-09-16. A secondary CVSS source baseline 3.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-81158 (ENISA EUVD) · GHSA-mc6q-xfc2-72q5 (GitHub Security Advisories)Source: ENISA EUVD

3.8EG
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: 0.2%CVSS: 3.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A vulnerability in the SSID bring-your-own-device (BYOD) onboarding workflow of Cisco ISE could allow an unauthenticated, adjacent attacker to hijack the onboarding session of another user and access protected 802.1X networks.   This vulnerability is due to insufficient authentication checks that are performed while a user is being onboarded. An attacker could exploit this vulnerability by spoofing the legitimate user and triggering a redirection to the guest web portal. A successful exploit could allow the attacker to take over the user session and gain access to the protected 802.1X network.

CVSS v3
3.8
EG Score
3.8LOWmedium confidence
EG Risk
17
EG Risk 17/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity38% × 45%
Impact severity (EG Severity): CVSS 3.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
14th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (3.8): severity, escalated by confirmed exploitation. This CVE's 3.8 is its impact severity (EG Severity), not escalated.

EG Severity
3.8 LOWCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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

A fix is available. 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.

The score's inputs: 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 16, 2026

Last Modified

September 18, 2026

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 30× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  12. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  13. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-10-25 14:44 UTCEchelonGraph re-scored
  20. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
Show 52 more
  1. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-18 03:57 UTCEchelonGraph re-scored
  3. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-16 21:57 UTCEchelonGraph re-scored
  5. 2026-10-16 21:57 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  6. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-12 16:24 UTCEchelonGraph re-scored
  11. 2026-10-11 20:06 UTCEchelonGraph re-scored
  12. 2026-10-11 17:19 UTCEchelonGraph re-scored
  13. 2026-10-11 14:51 UTCEchelonGraph re-scored
  14. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-10-10 17:45 UTCEchelonGraph re-scored
  17. 2026-10-10 17:45 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  18. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-07 13:43 UTCEchelonGraph re-scored
  22. 2026-10-07 13:43 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  23. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  26. 2026-10-04 09:45 UTCEchelonGraph re-scored
  27. 2026-10-04 09:44 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  28. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  29. 2026-10-01 05:44 UTCEchelonGraph re-scored
  30. 2026-10-01 05:44 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  31. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  32. 2026-09-29 15:21 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  33. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  34. 2026-09-28 01:46 UTCEchelonGraph re-scored
  35. 2026-09-28 01:46 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  36. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  37. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  38. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  39. 2026-09-24 21:40 UTCEchelonGraph re-scored
  40. 2026-09-24 21:40 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  41. 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  42. 2026-09-21 17:39 UTCEchelonGraph re-scored
  43. 2026-09-21 17:39 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  44. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  45. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  46. 2026-09-18 13:40 UTCEchelonGraph re-scored
  47. 2026-09-18 13:40 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  48. 2026-09-17 14:20 UTCEchelonGraph re-scored
  49. 2026-09-17 14:19 UTCGHSA enrichmentGHSA-mc6q-xfc2-72q5 · GitHub severity LOW · GitHub CVSS 3.8
  50. 2026-09-16 21:26 UTCEchelonGraph re-scored
  51. 2026-09-16 20:33 UTCEchelonGraph re-scoredFirst assessed: 3.8 LOW
  52. 2026-09-16 20:29 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-20071?
CVE-2026-20071 is a low-severity vulnerability; its CVE record was published on September 16, 2026. A vulnerability in the SSID bring-your-own-device (BYOD) onboarding workflow of Cisco ISE could allow an unauthenticated, adjacent attacker to hijack the onboarding session of another user and access protected 802.1X networks.   This vulnerability is due to insufficient authentication…
When was the CVE record for CVE-2026-20071 published?
The CVE record for CVE-2026-20071 was published on September 16, 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 September 18, 2026; the record at its source may have been updated since.
Is CVE-2026-20071 actively exploited?
CVE-2026-20071 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-20071?
CVE-2026-20071 has a CVSS base score of 3.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-20071?
A fix for CVE-2026-20071 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-20071 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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