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CVE-2026-20071VulnerabilityPublished

CWE-290

Source GCVE Database

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Authoritative record:CVE-2026-20071· Low 3.8

Not known to be exploited · CVSS 3.8 Low.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score
3.8Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
CiscoCisco Identity Services Engine SoftwareAffected
  • 3.1.0 – 3.5.0
5 affected builds
Fixed in–

AI-suggested

Until a patch is available, organizations should monitor vendor advisories for updates and consider restricting adjacency access to the onboarding network segment if feasible.

Description

A vulnerability in the SSID bring-your-own-device (BYOD) onboarding workflow of Cisco ISE allows an unauthenticated, adjacent attacker to hijack another user's onboarding session and access protected 802.1X networks. This occurs due to insufficient authentication checks during user onboarding. Exploitation involves spoofing the legitimate user and triggering a redirection to the guest web portal, enabling session takeover. The vulnerability has a low CVSS score of 3.8 and does not impact confidentiality or availability but can cause limited integrity loss. No patch or remediation information is provided.

References

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