Quick answers
- Is CVE-2026-20155 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20155 being exploited in the wild.
- How severe is CVE-2026-20155?
- High severity, with a CVSS score of 8, published 1 April 2026.
- Which products and versions are affected?
- Cisco Evolved Programmable Network Manager < 8.1.2.
- Is there a fix for CVE-2026-20155?
- A patch was published on 2026-04-01: Fixed in version 8.1.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-20155 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-20155?
- Check whether you run Cisco Evolved Programmable Network Manager at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A vulnerability in the web-based management interface of Cisco Evolved Programmable Network Manager (EPNM) is caused by improper authorization checks on a specific REST API endpoint (CWE-862). An authenticated, remote attacker with low privileges can exploit this by sending a crafted query to the affected endpoint. Successful exploitation allows the attacker to view session information for active users, including those with administrative privileges. This information can be leveraged to compromise the device or hijack sessions. Cisco has released software updates to address this issue; no workarounds are available.
Affected products
- Cisco Evolved Programmable Network Manager (EPNM) < 8.1.2
Timeline
- 2026-04-01: advisory: Initial public release by Cisco
- 2026-04-01: patched: Fixed in version 8.1.2