CVE-2026-76444: A vulnerability in an internal service of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote a

Routine

MEDIUM 5.3REMOTEDOWNGRADEDOWNGRADE

CVE-2026-76444 is a medium-severity flaw (CVSS 5.3) affecting identity services engine passive identity connector, identity services engine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in an internal service of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to retrieve sensitive configuration information from an affected device. This vulnerability is due to missing authentication on the Policy Runtime Repository Table (PRRT) service. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to obt

Why this priority

Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 72%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-09-16
Last modified	2026-09-28

Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco

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

Am I affected?

Timeline

2026-09-16 21:17 UTCPublished CVE record published
2026-09-28 13:06 UTCUpdated Record last modified

cisco identity services engine passive identity connector DOWNGRADE

Affected: 3.4.0 · 3.4.0 patch1 · 3.4.0 patch2 · 3.4.0 patch3 · 3.4.0 patch4 · 3.4.0 patch5 · 3.4.0 patch6

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.4.0

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. No fixed release: DOWNGRADE to a release before 3.4.0 (Debian / Ubuntu)

apt-cache madison identity-services-engine-passive-identity-connector sudo apt install identity-services-engine-passive-identity-connector=<VERSION_BEFORE_3.4.0> sudo apt-mark hold identity-services-engine-passive-identity-connector

2. No fixed release: 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_3.4.0> 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.

cisco identity services engine DOWNGRADE

Affected: 3.4.0 · 3.4.0 patch1 · 3.4.0 patch2 · 3.4.0 patch3 · 3.4.0 patch4 · 3.4.0 patch5 · 3.4.0 patch6 · 3.5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.4.0

1. Check installed version

apt-cache policy identity-services-engine || rpm -q identity-services-engine || identity-services-engine --version

2. No fixed release: DOWNGRADE to a release before 3.4.0 (Debian / Ubuntu)

apt-cache madison identity-services-engine sudo apt install identity-services-engine=<VERSION_BEFORE_3.4.0> sudo apt-mark hold identity-services-engine

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list identity-services-engine sudo dnf downgrade identity-services-engine-<VERSION_BEFORE_3.4.0> 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.

Advisories and coverage

Official advisories

Cisco Security Advisories: Cisco Identity Services Engine Authentication Bypass Vulnerabilities 2026-09-24

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-2026-76444?

identity services engine passive identity connector: downgrade or apply the listed mitigation; identity services engine: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-76444 being exploited?

CVE-2026-76444 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-2026-76444 affect?

CVE-2026-76444 affects identity services engine passive identity connector, identity services engine. Severity is medium (CVSS 5.3). A vulnerability in an internal service of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to retrieve sensitive configuration information from an affected device. This vulnerability is due to missing authentic

How urgent is CVE-2026-76444?

Priority 31/100. Remotely exploitable, no login, no user action

Software pages

Cisco vulnerabilities · Cisco ISE vulnerabilities

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References

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