How severe is CVE-2020-4587?

CVE-2020-4587 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-4587 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4587?

CVE-2020-4587 primarily affects Ibm Connect. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4587?

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.

When was CVE-2020-4587 published?

CVE-2020-4587 was published on 2020-08-24 and last updated on 2026-06-17.

CVE-2020-4587

CVE-2020-4587 is a high-severity vulnerability in Ibm Connect with a CVSS 3.x base score of 7.8. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Ibm Connect
Published: 2020-08-24
Last modified: 2026-06-17

Description

IBM Sterling Connect:Direct for UNIX 4.2.0, 4.3.0, 6.0.0, and 6.1.0 is vulnerable to a stack based buffer ovreflow, caused by improper bounds checking. A local attacker could manipulate CD UNIX to obtain root provileges. IBM X-Force ID: 184578.

Frequently asked questions

What is CVE-2020-4587?: IBM Sterling Connect:Direct for UNIX 4.2.0, 4.3.0, 6.0.0, and 6.1.0 is vulnerable to a stack based buffer ovreflow, caused by improper bounds checking. A local attacker could manipulate CD UNIX to obtain root provileges. IBM X-Force ID: 184578.
How severe is CVE-2020-4587?: CVE-2020-4587 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-4587 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4587?: CVE-2020-4587 primarily affects Ibm Connect. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4587?: 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.
When was CVE-2020-4587 published?: CVE-2020-4587 was published on 2020-08-24 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:ibm:connect\:direct:6.0.0:*:*:*:*:unix:*:*
cpe:2.3:a:ibm:connect\:direct:6.1.0:*:*:*:*:unix:*:*
cpe:2.3:a:ibm:sterling_connect\:direct:4.2.0:*:*:*:*:unix:*:*
cpe:2.3:a:ibm:sterling_connect\:direct:4.3.0:*:*:*:*:unix:*:*

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