CVE-2020-4450 Critical · 9.8 EPSS 34.7%
IBM WebSphere Application Server 8.5 and 9.0 traditional could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects. IBM X-Force ID: 181231.
IBM · WebSphere Application Server
Heading is the official description · CVE.org
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
63.5 / 100
- Exploited
- Yes, in VulnCheck KEV
- Reports
- 0
- Tactics
- 0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 4 years after disclosure.
- Disclosedday 0
- First seen exploitedVulnCheck KEV evidence+4 yrs
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linkedNo ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.
What security researchers reported
Not named in any threat report yetAlso mentioned in 6 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Update 10: Cybercriminals Leverage 66 Vulnerabilities to Target Global Systems2 Jul 2025
- NCSC Advisory - 18th Sept 2024 - PRC Botnet14 Jan 2025
- People's Republic of China-Linked Actors Compromise Routers and IoT Devices for Botnet Operations7 Jan 2025
- People's Republic of China-Linked Actors Compromise Routers and IoT Devices for Botnet Operations7 Jan 2025
- People's Republic of China-Linked Actors Compromise Routers and IoT Devices for Botnet Operations2 Oct 2024
- CSA-PRC-LINKED-ACTORS-BOTNET19 Sep 2024