CVE-2026-20155 Cisco Evolved Programmable Network Manager Improper Authorization Vulnerability
Authenticated low-privilege attackers can access sensitive session information via improper authorization checks, potentially leading to device compromise.
- 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-2026-20155?
CVE-2026-20155 is a high-severity missing authorization vulnerability in Cisco Evolved Programmable Network Manager, 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-based management interface of Cisco Evolved Programmable Network Manager (EPNM) could allow an authenticated, remote attacker with low privileges to access sensitive information that they are not authorized to access. This vulnerability is due to improper authorization checks on a REST API endpoint of an affected device. An attacker could exploit this vulnerability by querying the affected endpoint. A successful exploit could allow the attacker to view session information of active Cisco EPNM users, including users with administrative privileges, which could result in the affected device being compromised.
Weakness: CWE-862
Which versions are affected by CVE-2026-20155?
It affects 1 product.
Products include Cisco Evolved Programmable Network Manager.
How do I fix CVE-2026-20155?
No fix has been published for CVE-2026-20155 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-20155 being exploited?
There is no known exploitation of CVE-2026-20155 in the wild and no public exploit code.
Other vulnerabilities in Cisco Evolved Programmable Network Manager
- CVE-2016-1289 Code injection in n/a
- CVE-2016-1291 Deserialization in n/a
- CVE-2021-1487 Cisco Prime Infrastructure and Cisco Evolved Programmable Network Manager Command Injection Vulnerability
- CVE-2019-1821 Cisco Prime Infrastructure and Evolved Programmable Network Manager Remote Code Execution Vulnerabilities
- CVE-2019-1822 Cisco Prime Infrastructure and Evolved Programmable Network Manager Remote Code Execution Vulnerabilities
All Cisco Evolved Programmable Network Manager vulnerabilities
Sources
Also known as GHSA-g5c4-x88j-p4hw.