CVE-2023-54398

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 67.9% of scored records. A rank, not a probability.

NVD base score

9.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-09-24.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-15 16:43Z1 MO AGO

Last updated

2026-09-15 17:30Z1 MO AGO

Reserved

2026-09-15

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-502Deserialization of Untrusted DataBase

Data version

5.2

Document digest

50a0a54a363e61257848092297b5c873d3045683eb5c9b1b8e367bb07c5c996e

• security.yonyou.comVendor Advisoryhttps://security.yonyou.com/#/noticeInfo?id=400vendor-advisorypatch
• cn-sec.comCN-SEC Bloghttps://cn-sec.com/archives/2182384.htmltechnical-descriptionexploit
• blog.csdn.netCSDN Bloghttps://blog.csdn.net/qq_41904294/article/details/134277353technical-descriptionexploit
• avd.aliyun.comAVD Advisoryhttps://avd.aliyun.com/detail?id=AVD-2023-1686894third-party-advisory
• www.yonyou.comVendor Homepagehttps://www.yonyou.com/Global/product
• www.vulncheck.comhttps://www.vulncheck.com/advisories/yonyou-u8-cloud-java-deserialization-rce-via-filemanageservletthird-party-advisory