CVE-2020-4589
IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects from untrusted sources.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (8.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects from untrusted sources. IBM X-Force ID: 184585.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 8.46% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-502
- Affected
- ibm/websphere application server
- Source
- psirt@us.ibm.com
EPSS 8.5% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://exchange.xforce.ibmcloud.com/vulnerabilities/184585VDB Entry, Vendor Advisory
- https://www.ibm.com/support/pages/node/6258333Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/184585VDB Entry, Vendor Advisory
- https://www.ibm.com/support/pages/node/6258333Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.