CVE-2026-76389: In Cisco Talos Intelligence for Enterprise Security Cloud versions below 1.0.3, a user that holds a role with

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HIGH 8.8UPGRADE

CVE-2026-76389 is a high-severity flaw (CVSS 8.8) affecting talos intelligence for enterprise security cloud. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Cisco Talos Intelligence for Enterprise Security Cloud versions below 1.0.3, a user that holds a role with the get_talos_enrichment capability could send a crafted request to the Talos intelligence enrichment Representational State Transfer (REST) API endpoint and cause the instance to make an outbound request to an attacker-controlled server. The request could expose tokens that compromise all relevant data and system integrity in the Splunk

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-08-19
Last modified	2026-08-21

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

Last updated 2026-08-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-19 22:17 UTCPublished CVE record published
2026-08-21 19:18 UTCUpdated Record last modified

cisco talos intelligence for enterprise security cloud UPGRADE

Affected: >= 1.0.0 and < 1.0.3

Fixed in: 1.0.3

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy talos-intelligence-for-enterprise-security-cloud || rpm -q talos-intelligence-for-enterprise-security-cloud || talos-intelligence-for-enterprise-security-cloud --version

2. UPGRADE to 1.0.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade talos-intelligence-for-enterprise-security-cloud

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade talos-intelligence-for-enterprise-security-cloud

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 1.0.0 (Debian / Ubuntu)

apt-cache madison talos-intelligence-for-enterprise-security-cloud sudo apt install talos-intelligence-for-enterprise-security-cloud=<VERSION_BEFORE_1.0.0> sudo apt-mark hold talos-intelligence-for-enterprise-security-cloud

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list talos-intelligence-for-enterprise-security-cloud sudo dnf downgrade talos-intelligence-for-enterprise-security-cloud-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add talos-intelligence-for-enterprise-security-cloud

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-2026-76389?

talos intelligence for enterprise security cloud: upgrade to 1.0.3. Exact commands for each OS are on this page.

Is CVE-2026-76389 being exploited?

CVE-2026-76389 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-2026-76389 affect?

CVE-2026-76389 affects talos intelligence for enterprise security cloud. Severity is high (CVSS 8.8). In Cisco Talos Intelligence for Enterprise Security Cloud versions below 1.0.3, a user that holds a role with the get_talos_enrichment capability could send a crafted request to the Talos intelligence enrichment Representational State Trans

How urgent is CVE-2026-76389?

Priority 40/100. High severity

Software pages

Cisco vulnerabilities · Splunk vulnerabilities

Related CVEs

CVE-2026-76390 MEDIUM 5.3 UPGRADE In Cisco Talos Intelligence for Enterprise Security Cloud versions below 1.0.3, an unauthenticated user could

References

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