Is CVE-2023-33855 in the CISA KEV catalog?

No. CVE-2023-33855 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-33855?

CVE-2023-33855 has a CVSS v3 base score of 3.7 (LOW).

What is the EPSS score for CVE-2023-33855?

CVE-2023-33855 has an EPSS score of 0.45% (36th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-33855?

Upgrade common cryptographic architecture to 7.5.37 or later.

CVE & CISA-KEV Catalog

CVE-2023-33855

LOW

3.7

CVSS v3

NVD

Description

Under certain conditions, RSA operations performed by IBM Common Cryptographic Architecture (CCA) 7.0.0 through 7.5.36 may exhibit non-constant-time behavior. This could allow a remote attacker to obtain sensitive information using a timing-based attack. IBM X-Force ID: 257676.

CWE-385

How to fix

Remediation Available

common cryptographic architectureNVD

Affected:>= 7.0.0, < 7.5.37Fixed in:7.5.37CVE-2023-33855derived 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

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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 Advisory1

ibm.com

Third-Party Advisory1

exchange.xforce.ibmcloud.com

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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 2025-07-25.