How severe is CVE-2020-4640?

CVE-2020-4640 has a CVSS 3.x base score of 4.1, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-4640 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4640?

CVE-2020-4640 primarily affects Ibm Api Connect. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4640?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-4640 published?

CVE-2020-4640 was published on 2021-02-04 and last updated on 2026-06-17.

CVE-2020-4640

CVE-2020-4640 is a medium-severity vulnerability in Ibm Api Connect with a CVSS 3.x base score of 4.1. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.1)
CVSS v2: 3.8
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Ibm Api Connect
Published: 2021-02-04
Last modified: 2026-06-17

Description

Certain IBM API Connect 10.0.0.0 through 10.0.1.0 and 2018.4.1.0 through 2018.4.1.13 configurations can result in sensitive information in the URL fragment identifiers. This information can be cached in the intermediate nodes like proxy servers, cdn, logging platforms, etc. An attacker can make use of this information to perform attacks by impersonating a user. IBM X-Force ID: 185510.

Frequently asked questions

What is CVE-2020-4640?: Certain IBM API Connect 10.0.0.0 through 10.0.1.0 and 2018.4.1.0 through 2018.4.1.13 configurations can result in sensitive information in the URL fragment identifiers. This information can be cached in the intermediate nodes like proxy servers, cdn, logging platforms, etc. An attacker can make use of this information to perform attacks by impersonating a user. IBM X-Force ID: 185510.
How severe is CVE-2020-4640?: CVE-2020-4640 has a CVSS 3.x base score of 4.1, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-4640 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4640?: CVE-2020-4640 primarily affects Ibm Api Connect. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4640?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-4640 published?: CVE-2020-4640 was published on 2021-02-04 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:ibm:api_connect:*:*:*:*:*:*:*:*
cpe:2.3:a:ibm:api_connect:10.0.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:api_connect:10.0.1.0:*:*:*:*:*:*:*

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