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CVE-2026-20234

Cisco Identity Services Engine Hardening Release - Insuffiencently Protected Credential Vulnerabilities

No known exploitation. EPSS puts it in the 34th percentile. Fixed in 3.3.0.

CVSS 3.19.9CriticalEPSS percentile34th0.4% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix3.3.0Upgrade to this build
Check it yourself

OpenVAS · 1 check

e.g. OID 1.3.6.1.4.1.25623.1.0.157983

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Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Cisco Identity Services Engine SoftwareAffected: 3.1.0Upgrade to: not statedAffected: 3.1.0 p1Upgrade to: not statedAffected: 3.1.0 p3Upgrade to: not statedAffected: 3.1.0 p2Upgrade to: not stated + 43 more branchesStated by: CVE record
  • Cisco ISE Passive Identity ConnectorAffected: 3.2.0Upgrade to: not statedAffected: 3.1.0Upgrade to: not statedAffected: 3.3.0Upgrade to: not statedAffected: 3.4.0Upgrade to: not stated + 1 more branchStated by: CVE record
  • Cisco Identity Services EngineAffected: ≥ 3.1.0, < 3.3.0Upgrade to: 3.3.0Stated by: NVD
  • Cisco Identity Services Engine Passive Identity ConnectorAffected: ≥ 3.1.0, < 3.3.0Upgrade to: 3.3.0Stated by: NVD

Versions as the sources state them. Full version matrix after sign-in

Steps

Written by AI from the record
  1. Confirm whether your organization runs Cisco Identity Services Engine software or Cisco ISE Passive Identity Connector, including appliances managed by a provider.
  2. Ask Cisco or your IT provider whether your installed release is affected by CVE-2026-20234 and whether any hardening release is available.
  3. No fixed version has been provided in the available findings; obtain Cisco’s supported remediation guidance before making changes.
  4. Until remediation is available, restrict administrative access to trusted staff and review privileged account activity for unexpected changes.
May need vendor or contractor work
Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) engineering teams have conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20234 are related to insufficiently protected credentials issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-522.

In plain language

Written by AI from the record

A critical credential-protection flaw affects Cisco Identity Services Engine software and Cisco ISE Passive Identity Connector; businesses using either should act now because public attack code is available.

CWE-522 insufficiently protected credentials vulnerabilities in Cisco Identity Services Engine software and Cisco ISE Passive Identity Connector can enable a logged-in attacker to compromise confidentiality, integrity, and availability across security scopes.

If you're affected

  • Network access control takeover
  • Credential exposure
  • Policy changes
  • Service disruption
  • Ransomware risk

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS34th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.4% chance of exploitation activity in the next 30 days, which ranks it in the 34th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

9 events over 36 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Patch availablerecord updated
  3. Record updatedrecord updated
  4. Publishedweakness classified, att&ck mapped, record updated

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Scored 9.9 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

In the news

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