How severe is CVE-2020-27583?

CVE-2020-27583 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-27583 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27583?

CVE-2020-27583 affects Ibm Infosphere Information Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27583?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-27583 published?

CVE-2020-27583 was published on 2021-01-26 and last updated on 2026-06-17.

CVE-2020-27583

CVE-2020-27583 is a critical-severity vulnerability in Ibm Infosphere Information Server with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Ibm Infosphere Information Server
Published: 2021-01-26
Last modified: 2026-06-17

Description

IBM InfoSphere Information Server 8.5.0.0 is affected by deserialization of untrusted data which could allow remote unauthenticated attackers to execute arbitrary code. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Frequently asked questions

What is CVE-2020-27583?: IBM InfoSphere Information Server 8.5.0.0 is affected by deserialization of untrusted data which could allow remote unauthenticated attackers to execute arbitrary code. NOTE: This vulnerability only affects products that are no longer supported by the maintainer
How severe is CVE-2020-27583?: CVE-2020-27583 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-27583 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27583?: CVE-2020-27583 affects Ibm Infosphere Information Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27583?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-27583 published?: CVE-2020-27583 was published on 2021-01-26 and last updated on 2026-06-17.

References

https://n4nj0.github.io/advisories/ibm-infosphere-java-deserialization/

Affected products (1)

cpe:2.3:a:ibm:infosphere_information_server:8.5:*:*:*:*:*:*:*

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