CVE-2026-20155
CVE-2026-20155 is a high-severity vulnerability in Cisco Evolved Programmable Network Manager with a CVSS 3.x base score of 8.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.
Key facts
- Severity: High (CVSS 3.x base score 8.0)
- EPSS exploit prediction: 0% (17th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-17955
- Weakness: CWE-862
- Affected product: Cisco Evolved Programmable Network Manager
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-20155?
- 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.
- How severe is CVE-2026-20155?
- CVE-2026-20155 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-20155 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-20155?
- CVE-2026-20155 affects Cisco Evolved Programmable Network Manager. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-20155?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-20155 have an EU (EUVD) identifier?
- Yes. CVE-2026-20155 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17955.
- When was CVE-2026-20155 published?
- CVE-2026-20155 was published on 2026-04-01 and last updated on 2026-07-02.
References
Affected products (1)
- cpe:2.3:a:cisco:evolved_programmable_network_manager:*:*:*:*:*:*:*:*
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