Is CVE-2021-39090 in the CISA KEV catalog?

No. CVE-2021-39090 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-39090?

CVE-2021-39090 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2021-39090?

CVE-2021-39090 has an EPSS score of 0.45% (36th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-39090?

Upgrade cloud pak for security to 1.10.7.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-39090

MEDIUM

5.9

CVSS v3

NVD

Description

IBM Cloud Pak for Security (CP4S) 1.10.0.0 through 1.10.6.0 could allow a remote attacker to obtain sensitive information, caused by the failure to properly enable HTTP Strict Transport Security. An attacker could exploit this vulnerability to obtain sensitive information using man in the middle techniques. IBM X-Force ID: 216388.

CWE-311 CWE-319

How to fix

Remediation Available

cloud pak for securityNVD

Affected:>= 1.10.0.0, < 1.10.7.0Fixed in:1.10.7.0CVE-2021-39090derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.45%probability of exploitation in 30 days

36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-311 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2026-27944	Critical	9.8	22%	-	Fix
CVE-2026-34486	High	7.5	16%	-	-
CVE-2019-11367	Critical	9.8	2.8%	-	Fix
CVE-2017-8221	High	7.5	2.7%	-	-
CVE-2016-10593	High	8.1	2.3%	-	-
CVE-2018-10698	Critical	9.8	2.3%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-12-31.