How severe is CVE-2021-20552?

CVE-2021-20552 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-20552 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20552?

CVE-2021-20552 affects Ibm Sterling File Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20552?

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

When was CVE-2021-20552 published?

CVE-2021-20552 was published on 2021-10-07 and last updated on 2026-06-17.

CVE-2021-20552

CVE-2021-20552 is a medium-severity vulnerability in Ibm Sterling File Gateway with a CVSS 3.x base score of 4.3. 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-209.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-209
Affected product: Ibm Sterling File Gateway
Published: 2021-10-07
Last modified: 2026-06-17

Description

IBM Sterling File Gateway 6.0.0.0 through 6.1.1.0 could allow a remote attacker to obtain sensitive information when a detailed technical error message is returned in the browser. This information could be used in further attacks against the system. IBM X-Force ID: 199170.

Frequently asked questions

What is CVE-2021-20552?: IBM Sterling File Gateway 6.0.0.0 through 6.1.1.0 could allow a remote attacker to obtain sensitive information when a detailed technical error message is returned in the browser. This information could be used in further attacks against the system. IBM X-Force ID: 199170.
How severe is CVE-2021-20552?: CVE-2021-20552 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-20552 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20552?: CVE-2021-20552 affects Ibm Sterling File Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20552?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20552 published?: CVE-2021-20552 was published on 2021-10-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:sterling_file_gateway:*:*:*:*:*:*:*:*

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