CVE-2026-76424: A vulnerability in the REST API of Cisco ISE could allow an authenticated, remote attacker to upload or copy a

This month

HIGH 7.2UPGRADE

CVE-2026-76424 is a high-severity flaw (CVSS 7.2) affecting identity services engine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the REST API of Cisco ISE could allow an authenticated, remote attacker to upload or copy arbitrary files on an affected device. This vulnerability is due to insufficient validation in file operations. An attacker could exploit this vulnerability by uploading a file with a crafted path. A successful exploit could allow the attacker to upload files to arbitrary locations and execute arbitrary commands as root on the affected

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-23
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 12:27 UTCUpdated Record last modified

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.

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-2026-76424?

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

Is CVE-2026-76424 being exploited?

CVE-2026-76424 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-2026-76424 affect?

CVE-2026-76424 affects identity services engine. Severity is high (CVSS 7.2). A vulnerability in the REST API of Cisco ISE could allow an authenticated, remote attacker to upload or copy arbitrary files on an affected device. This vulnerability is due to insufficient validation in file operations. An attacker coul

How urgent is CVE-2026-76424?

Priority 40/100. High severity

Software pages

Cisco vulnerabilities · Cisco ISE vulnerabilities

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References

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