CVE-2026-20151 Cisco Smart Software Manager On-Prem Privilege Escalation Vulnerability
Authenticated attackers can elevate privileges to administrative level by retrieving session credentials from status messages in Cisco SSM On-Prem.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-20151?
CVE-2026-20151 is a high-severity vulnerability in Cisco Smart Software Manager On-Prem, published on 1 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-201
Which versions are affected by CVE-2026-20151?
It affects 1 product.
Products include Cisco Smart Software Manager On-Prem.
How do I fix CVE-2026-20151?
No fix has been published for CVE-2026-20151 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-20151 being exploited?
There is no known exploitation of CVE-2026-20151 in the wild and no public exploit code.
Other vulnerabilities in Cisco Smart Software Manager On-Prem
- CVE-2024-20419 Auth bypass in Cisco Smart Software Manager On-Prem
- CVE-2026-20160 Cisco Smart Software Manager On-Prem Arbitrary Command Execution Vulnerability
- CVE-2020-3158 Cisco Smart Software Manager On-Prem Static Default Credential Vulnerability
- CVE-2020-3443 Cisco Smart Software Manager On-Prem Privilege Escalation Vulnerability
- CVE-2019-16029 Cisco Smart Software Manager On-Prem Web Interface Denial of Service Vulnerability
Sources
Also known as GHSA-753x-3fmj-hv4q.