How severe is CVE-2017-7420?

CVE-2017-7420 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-7420 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7420?

CVE-2017-7420 primarily affects Microfocus Enterprise Developer. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-7420?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2017-7420 published?

CVE-2017-7420 was published on 2017-08-21 and last updated on 2026-06-17.

CVE-2017-7420

CVE-2017-7420 is a critical-severity vulnerability in Microfocus Enterprise Developer with a CVSS 3.x base score of 9.8. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Microfocus Enterprise Developer
Published: 2017-08-21
Last modified: 2026-06-17

Description

An Authentication Bypass (CWE-287) vulnerability in ESMAC (aka Enterprise Server Monitor and Control) in Micro Focus Enterprise Developer and Enterprise Server 2.3 and earlier, 2.3 Update 1 before Hotfix 8, and 2.3 Update 2 before Hotfix 9 allows remote unauthenticated attackers to view and alter configuration information and alter the state of the running product (CWE-275).

Frequently asked questions

What is CVE-2017-7420?: An Authentication Bypass (CWE-287) vulnerability in ESMAC (aka Enterprise Server Monitor and Control) in Micro Focus Enterprise Developer and Enterprise Server 2.3 and earlier, 2.3 Update 1 before Hotfix 8, and 2.3 Update 2 before Hotfix 9 allows remote unauthenticated attackers to view and alter configuration information and alter the state of the running product (CWE-275).
How severe is CVE-2017-7420?: CVE-2017-7420 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-7420 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-7420?: CVE-2017-7420 primarily affects Microfocus Enterprise Developer. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-7420?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-7420 published?: CVE-2017-7420 was published on 2017-08-21 and last updated on 2026-06-17.

References

https://community.microfocus.com/microfocus/mainframe_solutions/enterprise_server/w/knowledge_base/29131/enterprise-server-security-fixes-july-2017

Affected products (7)

cpe:2.3:a:microfocus:enterprise_developer:2.3:*:*:*:*:*:*:*
cpe:2.3:a:microfocus:enterprise_developer:2.3:update1:*:*:*:*:*:*
cpe:2.3:a:microfocus:enterprise_developer:2.3:update2:*:*:*:*:*:*
cpe:2.3:a:microfocus:enterprise_server:*:*:*:*:*:*:*:*
cpe:2.3:a:microfocus:enterprise_server:2.3:update1:*:*:*:*:*:*
cpe:2.3:a:microfocus:enterprise_server:2.3:update2:*:*:*:*:*:*
cpe:2.3:a:microfocus:enterprise_server_monitor_and_control:-:*:*:*:*:*:*:*

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