CVE-2026-20155: A vulnerability in the web-based management interface of Cisco Evolved Programmable Network Manager (EPNM) cou

Q: How do I fix CVE-2026-20155?

evolved programmable network manager: upgrade to 8.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-20155 being exploited?

CVE-2026-20155 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-20155 affect?

CVE-2026-20155 affects evolved programmable network manager. Severity is high (CVSS 8.0). 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 acc

Routine

HIGH 8.0UPGRADE

CVE-2026-20155 is a high-severity flaw (CVSS 8.0) affecting evolved programmable network manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-862
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 21:10 UTCUpdated Record last modified

cisco evolved programmable network manager UPGRADE

Affected: < 8.1.2

Fixed in: 8.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy evolved-programmable-network-manager || rpm -q evolved-programmable-network-manager || evolved-programmable-network-manager --version

2. UPGRADE to 8.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade evolved-programmable-network-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade evolved-programmable-network-manager

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-20155?

evolved programmable network manager: upgrade to 8.1.2. Exact commands for each OS are on this page.

Is CVE-2026-20155 being exploited?

CVE-2026-20155 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-2026-20155 affect?

CVE-2026-20155 affects evolved programmable network manager. Severity is high (CVSS 8.0). 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 acc

How urgent is CVE-2026-20155?

Priority 33/100. High severity

Software pages

Cisco vulnerabilities

References

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