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CVE-2026-20192: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services E

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CRITICAL 10.0REMOTEUPGRADEUPGRADE

CVE-2026-20192 is a critical-severity flaw (CVSS 10.0) affecting identity services engine, identity services engine passive identity connector. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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-2026-20192 are related to improper access contro

Why this priority

  • Critical severity
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score10.0 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.5% (top 60%)
CISA exploited listNo
WeaknessCWE-284
Published2026-09-16
Last modified2026-09-28
Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco

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Last updated 2026-09-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

cisco identity services engine UPGRADE
Affected: >= 3.1.0 and < 3.3.0 · 3.3.0 patch1 · 3.3.0 patch10 · 3.3.0 patch11 · 3.3.0 patch2 · 3.3.0 patch3 · 3.3.0 patch4 · 3.3.0 patch5
Fixed in: 3.3.0
Safe to downgrade to: a release before 3.1.0
1. Check installed version
apt-cache policy identity-services-engine || rpm -q identity-services-engine || identity-services-engine --version
2. UPGRADE to 3.3.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade identity-services-engine
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade identity-services-engine
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 3.1.0 (Debian / Ubuntu)
apt-cache madison identity-services-engine sudo apt install identity-services-engine=<VERSION_BEFORE_3.1.0> sudo apt-mark hold identity-services-engine
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list identity-services-engine sudo dnf downgrade identity-services-engine-<VERSION_BEFORE_3.1.0> sudo dnf versionlock add identity-services-engine
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
cisco identity services engine passive identity connector UPGRADE
Affected: >= 3.1.0 and < 3.3.0 · 3.3.0 patch1 · 3.3.0 patch10 · 3.3.0 patch11 · 3.3.0 patch2 · 3.3.0 patch3 · 3.3.0 patch4 · 3.3.0 patch5
Fixed in: 3.3.0
Safe to downgrade to: a release before 3.1.0
1. Check installed version
apt-cache policy identity-services-engine-passive-identity-connector || rpm -q identity-services-engine-passive-identity-connector || identity-services-engine-passive-identity-connector --version
2. UPGRADE to 3.3.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade identity-services-engine-passive-identity-connector
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade identity-services-engine-passive-identity-connector
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 3.1.0 (Debian / Ubuntu)
apt-cache madison identity-services-engine-passive-identity-connector sudo apt install identity-services-engine-passive-identity-connector=<VERSION_BEFORE_3.1.0> sudo apt-mark hold identity-services-engine-passive-identity-connector
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list identity-services-engine-passive-identity-connector sudo dnf downgrade identity-services-engine-passive-identity-connector-<VERSION_BEFORE_3.1.0> sudo dnf versionlock add identity-services-engine-passive-identity-connector
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Official advisories

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-20192?

identity services engine: upgrade to 3.3.0; identity services engine passive identity connector: upgrade to 3.3.0. Exact commands for each OS are on this page.

Is CVE-2026-20192 being exploited?

CVE-2026-20192 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-20192 affect?

CVE-2026-20192 affects identity services engine, identity services engine passive identity connector. Severity is critical (CVSS 10.0). 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

How urgent is CVE-2026-20192?

Priority 50/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Cisco vulnerabilities · Cisco ISE vulnerabilities

Related CVEs

References

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