CVE-2020-4450
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 34.7%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- 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
- 34.73% probability · 98th 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 34.7% since 3 November 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/181231VDB Entry, Vendor Advisory
- https://www.ibm.com/support/pages/node/6220294Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-689/Third Party Advisory, VDB Entry
- https://exchange.xforce.ibmcloud.com/vulnerabilities/181231VDB Entry, Vendor Advisory
- https://www.ibm.com/support/pages/node/6220294Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-689/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.