CVE-2026-20151

highcovered by 1 sourcefirst seen 2026-04-01

A vulnerability in the web interface of Cisco Smart Software Manager On-Prem (SSM On-Prem) could allow an authenticated, remote attacker to elevate privileges on an affected system. This vulnerability is due to the improper transmission of sensitive user information. An attacker could exploit this vulnerability by sending a crafted message to an affected Cisco SSM On-Prem host and retrieving session credentials from subsequent status messages. A successful exploit could allow the attacker to elevate privileges on the affected system from low to administrative. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of System User. Note: This vulnerability exposes information only about users who logged in to the Cisco SSM On-Prem host using the web interface and who are currently logged in. SSH sessions are not affected. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cssm-priv-esc-xRAnOuO8 Security Impact Rating: High CVE: CVE-2026-20151

CSIRTS triage

What: A vulnerability allows an authenticated remote attacker to elevate privileges on the system.
Who is affected: Authenticated users with System User role on Cisco SSM On-Prem.
Urgency: Remediation is urgent due to the potential for privilege escalation.
Action: Update Cisco SSM On-Prem to the latest version to mitigate the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Low exploitation risk0.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.

Advisory coverage (1)

highCisco Smart Software Manager On-Prem Privilege Escalation Vulnerabilitycisco-psirt · 2026-04-01

External references

NVD record for CVE-2026-20151

CVE.org record

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