No exploitation reportedFix available

CVE-2020-4888

No exploitation reported by the sources we read.

Published2021-01-28
WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

IBM QRadar SIEM 7.4.0 to 7.4.2 Patch 1 and 7.3.0 to 7.3.3 Patch 7 could allow a remote attacker to execute arbitrary commands on the system, caused by insecure deserialization of user-supplied content by the Java deserialization function. By sending a malicious serialized Java object, an attacker could exploit this vulnerability to execute arbitrary commands on the system. IBM X-Force ID: 190912.

Timeline

dates in UTC

2021-01-2813:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-4888?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-4888?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Ibm qradar security information and event manager

Branch	Affected	Fixed in	Source
7.3	= 7.3.0	no fix published	NVD
7.3	= 7.3.1	no fix published	NVD
7.3	= 7.3.2	no fix published	NVD
7.3	= 7.3.3	no fix published	NVD
7.4	= 7.4.0	no fix published	NVD
7.4	= 7.4.1	no fix published	NVD
7.4	= 7.4.2	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

exchange.xforce.ibmcloud.comVendor Advisory
www.ibm.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.18.8read 2026-10-23
CNACVSS 3.06.3read 2026-10-23
NVDCVSS 2.09read 2026-10-23
NVDweakness (CWE)CWE-502read 2026-10-23
FIRST EPSSEPSS score62.3 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2021-01-28
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-4888?

Is CVE-2020-4888 actively exploited?

Active exploitation of CVE-2020-4888 has not been confirmed. Its EPSS score was 62.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-4888?

CVE-2020-4888 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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