How severe is CVE-2020-4400?

CVE-2020-4400 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-4400 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4400?

CVE-2020-4400 primarily affects Ibm Verify Gateway. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4400?

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-2020-4400 published?

CVE-2020-4400 was published on 2020-07-22 and last updated on 2026-06-17.

CVE-2020-4400

CVE-2020-4400 is a high-severity vulnerability in Ibm Verify Gateway with a CVSS 3.x base score of 7.5. 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-307.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-307
Affected product: Ibm Verify Gateway
Published: 2020-07-22
Last modified: 2026-06-17

Description

IBM Verify Gateway (IVG) 1.0.0 and 1.0.1 uses an inadequate account lockout setting that could allow a remote attacker to brute force account credentials. IBM X-Force ID: 179478.

Frequently asked questions

What is CVE-2020-4400?: IBM Verify Gateway (IVG) 1.0.0 and 1.0.1 uses an inadequate account lockout setting that could allow a remote attacker to brute force account credentials. IBM X-Force ID: 179478.
How severe is CVE-2020-4400?: CVE-2020-4400 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-4400 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4400?: CVE-2020-4400 primarily affects Ibm Verify Gateway. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4400?: 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-2020-4400 published?: CVE-2020-4400 was published on 2020-07-22 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:ibm:verify_gateway:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:verify_gateway:1.0.1:*:*:*:*:*:*:*

More vulnerabilities in Ibm Verify Gateway

CVE-2020-4385 — Critical (CVSS 9.8): IBM Verify Gateway (IVG) 1.0.0 and 1.0.1 contains hard-coded credentials, such as a password or cryptographic key,…
CVE-2020-4372 — High (CVSS 7.8): IBM Verify Gateway (IVG) 1.0.0 and 1.0.1 stores user credentials in plain in clear text which can be read by a local…
CVE-2020-4399 — Medium (CVSS 6.5): IBM Verify Gateway (IVG) 1.0.0 and 1.0.1 could allow an authenticated user to send malformed requests to cause a denial…
CVE-2020-4397 — Medium (CVSS 5.9): IBM Verify Gateway (IVG) 1.0.0 and 1.0.1 transmits sensitive information in plain text which could be obtained by an…
CVE-2020-4369 — Medium (CVSS 5.5): IBM Verify Gateway (IVG) 1.0.0 and 1.0.1 stores highly sensitive information in cleartext that could be obtained by a…
CVE-2020-4405 — Medium (CVSS 4.3): IBM Verify Gateway (IVG) 1.0.0 and 1.0.1 could disclose potentially sensitive information to an authenticated user due…

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