How severe is CVE-2021-20489?

CVE-2021-20489 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-20489 being actively exploited?

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

What products are affected by CVE-2021-20489?

CVE-2021-20489 affects Ibm Sterling File Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20489?

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-2021-20489 published?

CVE-2021-20489 was published on 2021-10-07 and last updated on 2026-06-17.

CVE-2021-20489

CVE-2021-20489 is a high-severity vulnerability in Ibm Sterling File Gateway with a CVSS 3.x base score of 8.8. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Ibm Sterling File Gateway
Published: 2021-10-07
Last modified: 2026-06-17

Description

IBM Sterling File Gateway 2.2.0.0 through 6.1.1.0 is vulnerable to cross-site request forgery which could allow an attacker to execute malicious and unauthorized actions transmitted from a user that the website trusts. IBM X-Force ID: 197790.

Frequently asked questions

What is CVE-2021-20489?: IBM Sterling File Gateway 2.2.0.0 through 6.1.1.0 is vulnerable to cross-site request forgery which could allow an attacker to execute malicious and unauthorized actions transmitted from a user that the website trusts. IBM X-Force ID: 197790.
How severe is CVE-2021-20489?: CVE-2021-20489 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-20489 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20489?: CVE-2021-20489 affects Ibm Sterling File Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20489?: 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-2021-20489 published?: CVE-2021-20489 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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