CVE-2023-54398

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-15. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Yonyou U8 Cloud contains an unauthenticated Java deserialization vulnerability in the nc.impl.pub.filesystem.FileManageServlet component that allows remote unauthenticated attackers to execute arbitrary OS commands by sending a serialized payload via POST request. Attackers can exploit the doAction method, which passes raw HTTP request body data directly to ObjectInputStream.readObject() without filtering, to achieve remote code execution. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-02-13.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 15, 2026

Advisory Details (5)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

Enterprise Digital-Intelligence Yonyou BIP - Yonyou Global Official Website

https://www.yonyou.com/Global/
generic

Yonyou U8 Cloud Java Deserialization RCE via FileManageServlet | Advisories | VulnCheck

https://www.vulncheck.com/advisories/yonyou-u8-cloud-java-deserialization-rce-via-filemanageservlet
generic

用友安全中心

https://security.yonyou.com/#/noticeInfo?id=400
generic

用友U8 Cloud 反序列化漏洞 | CN-SEC 中文网

https://cn-sec.com/archives/2182384.html
generic
https://avd.aliyun.com/detail?id=AVD-2023-1686894

Vendor Advisories for CVE-2023-54398(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 42× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-20 20:14 UTCEPSS rescore
  2. 2026-09-20 20:14 UTCEPSS rescore
  3. 2026-09-20 19:25 UTCGHSA enrichment
  4. 2026-09-20 15:17 UTCGHSA enrichment
  5. 2026-09-20 11:06 UTCGHSA enrichment
  6. 2026-09-20 06:58 UTCGHSA enrichment
  7. 2026-09-20 02:22 UTCGHSA enrichment
  8. 2026-09-19 22:14 UTCGHSA enrichment
  9. 2026-09-19 18:07 UTCEG score recompute
  10. 2026-09-19 18:07 UTCGHSA enrichment
  11. 2026-09-19 13:59 UTCGHSA enrichment
  12. 2026-09-19 09:43 UTCGHSA enrichment
  13. 2026-09-19 05:30 UTCGHSA enrichment
  14. 2026-09-19 01:22 UTCGHSA enrichment
  15. 2026-09-18 21:15 UTCEG score recompute
  16. 2026-09-18 21:15 UTCGHSA enrichment
  17. 2026-09-18 19:26 UTCEPSS rescore
  18. 2026-09-18 16:38 UTCGHSA enrichment
  19. 2026-09-18 12:31 UTCGHSA enrichment
  20. 2026-09-18 08:24 UTCGHSA enrichment
  21. 2026-09-18 04:17 UTCGHSA enrichment
  22. 2026-09-18 00:10 UTCGHSA enrichment
  23. 2026-09-17 20:02 UTCEG score recompute
  24. 2026-09-17 20:02 UTCGHSA enrichment
  25. 2026-09-17 15:54 UTCGHSA enrichment
Show 17 more
  1. 2026-09-17 11:47 UTCGHSA enrichment
  2. 2026-09-17 07:39 UTCGHSA enrichment
  3. 2026-09-17 03:31 UTCGHSA enrichment
  4. 2026-09-16 23:24 UTCGHSA enrichment
  5. 2026-09-16 19:16 UTCGHSA enrichment
  6. 2026-09-16 15:09 UTCEG score recompute
  7. 2026-09-16 15:09 UTCGHSA enrichment
  8. 2026-09-16 14:06 UTCEPSS rescore
  9. 2026-09-16 11:01 UTCGHSA enrichment
  10. 2026-09-16 06:54 UTCGHSA enrichment
  11. 2026-09-16 02:48 UTCGHSA enrichment
  12. 2026-09-15 22:41 UTCGHSA enrichment
  13. 2026-09-15 18:33 UTCEG score recompute
  14. 2026-09-15 18:33 UTCGHSA enrichment
  15. 2026-09-15 17:32 UTCEG score recompute
  16. 2026-09-15 16:53 UTCEG score recompute
  17. 2026-09-15 16:52 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-54398?
CVE-2023-54398 is a critical vulnerability published on September 15, 2026. Yonyou U8 Cloud contains an unauthenticated Java deserialization vulnerability in the nc.impl.pub.filesystem.FileManageServlet component that allows remote unauthenticated attackers to execute arbitrary OS commands by sending a serialized payload via POST request. Attackers can exploit the doAction…
When was CVE-2023-54398 disclosed?
CVE-2023-54398 was first published in the National Vulnerability Database on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-54398 actively exploited?
CVE-2023-54398 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 50.6% of all scored CVEs.
What is the CVSS score of CVE-2023-54398?
CVE-2023-54398 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-54398?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-54398, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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