CVE-2026-20160: A vulnerability in Cisco Smart Software Manager On-Prem (SSM On-Prem) could allow an unauthenticated, remote a

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-20160 is a critical-severity flaw (CVSS 9.8) affecting smart software manager on-prem. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in Cisco Smart Software Manager On-Prem (SSM On-Prem) could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected SSM On-Prem host. This vulnerability is due to the unintentional exposure of an internal service. An attacker could exploit this vulnerability by sending a crafted request to the API of the exposed service. A successful exploit could allow the

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-668
Published	2026-04-01
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-01 17:28 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

cisco smart software manager on-prem UPGRADE

Affected: >= 9-202502 and < 9-202601

Fixed in: 9-202601

Safe to downgrade to: a release before 9-202502

1. Check installed version

apt-cache policy smart-software-manager-on-prem || rpm -q smart-software-manager-on-prem || smart-software-manager-on-prem --version

2. UPGRADE to 9-202601 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade smart-software-manager-on-prem

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade smart-software-manager-on-prem

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 9-202502 (Debian / Ubuntu)

apt-cache madison smart-software-manager-on-prem sudo apt install smart-software-manager-on-prem=<VERSION_BEFORE_9-202502> sudo apt-mark hold smart-software-manager-on-prem

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

dnf --showduplicates list smart-software-manager-on-prem sudo dnf downgrade smart-software-manager-on-prem-<VERSION_BEFORE_9-202502> sudo dnf versionlock add smart-software-manager-on-prem

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-2026-20160?

smart software manager on-prem: upgrade to 9-202601. Exact commands for each OS are on this page.

Is CVE-2026-20160 being exploited?

CVE-2026-20160 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-2026-20160 affect?

CVE-2026-20160 affects smart software manager on-prem. Severity is critical (CVSS 9.8). A vulnerability in Cisco Smart Software Manager On-Prem (SSM On-Prem) could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected SSM On-Prem host. This vulnerability is

How urgent is CVE-2026-20160?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Cisco vulnerabilities

Related CVEs

CVE-2026-20151 HIGH 7.3 UPGRADE A vulnerability in the web interface of Cisco Smart Software Manager On-Prem (SSM On-Prem) could allow an auth

References

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