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Fencer Vulns
medium 6.3

CVE-2020-4280 json

IBM QRadar SIEM 7.3 and 7.4 could allow a remote attacker to execute arbitrary commands on the system, caused by insecure deserialization o…

published 2020-10-08 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-25527

cvss
6.3
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
68.5%
EPSS 68.5% chance of exploitation in 30 days, percentile 99.3%
public exploits
0
none known

Summary

IBM QRadar SIEM 7.3 and 7.4 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: 176140.

Patch / fix

Exploit prediction

68.52% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • seclists.org http://seclists.org/fulldisclosure/2020/Oct/18 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/159589/QRadar-RemoteJavaScript-Deserialization.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 6.3 CVSS:3.0/AC:L/A:L/I:L/C:L/PR:L/UI:N/S:U/AV:N/E:U/RC:C/RL:O
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.0 6.3 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

  • IBM QRadar SIEM

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.