CVE-2026-16451

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreHIGH confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-07-21. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: Elevated riskExposed: 0

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

A security flaw has been discovered in zsadmin2025 ZS-Admin up to b52e14536d59fda11e56e2536a1c32e82a38cead. This impacts an unknown function of the file /api/system/file/upload of the component com.zs.file.controller.SysFileController. Performing a manipulation of the argument File results in unrestricted upload. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
6.3
EG Score
6.3(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

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
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jul 21, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Unrestricted File Extension Upload · Issue #6 · zsadmin2025/zs-admin-java · GitHub

https://github.com/zsadmin2025/zs-admin-java/issues/6

Vendor Advisories for CVE-2026-16451(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 24× 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. 2026-07-28 09:06 UTCEG score recompute
  2. 2026-07-28 09:05 UTCGHSA enrichment
  3. 2026-07-27 14:13 UTCEPSS rescore
  4. 2026-07-27 09:47 UTCEG score recompute
  5. 2026-07-27 09:47 UTCGHSA enrichment
  6. 2026-07-26 14:54 UTCEPSS rescore
  7. 2026-07-26 14:54 UTCEPSS rescore
  8. 2026-07-26 10:30 UTCEG score recompute
  9. 2026-07-26 10:30 UTCGHSA enrichment
  10. 2026-07-25 14:17 UTCEPSS rescore
  11. 2026-07-25 14:17 UTCEPSS rescore
  12. 2026-07-24 14:17 UTCEPSS rescore
  13. 2026-07-23 14:18 UTCEPSS rescore
  14. 2026-07-23 14:18 UTCEPSS rescore
  15. 2026-07-23 03:06 UTCEG score recompute
  16. 2026-07-22 23:06 UTCEG score recompute
  17. 2026-07-22 23:05 UTCGHSA enrichment
  18. 2026-07-22 16:51 UTCNVD updateCVSS v4 → 2.1
  19. 2026-07-22 14:46 UTCMITRE cvelistV5CVSS v4 → 5.3
  20. 2026-07-22 14:08 UTCEPSS rescore
  21. 2026-07-21 17:19 UTCEG score recompute
  22. 2026-07-21 17:18 UTCNVD updateCVSS v4 → 2.1
  23. 2026-07-21 17:04 UTCEG score recompute
  24. 2026-07-21 17:03 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16451?
CVE-2026-16451 is a medium vulnerability published on July 21, 2026. A security flaw has been discovered in zsadmin2025 ZS-Admin up to b52e14536d59fda11e56e2536a1c32e82a38cead. This impacts an unknown function of the file /api/system/file/upload of the component com.zs.file.controller.SysFileController. Performing a manipulation of the argument File results in…
When was CVE-2026-16451 disclosed?
CVE-2026-16451 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16451 actively exploited?
CVE-2026-16451 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 89.7% of all scored CVEs.
What is the CVSS score of CVE-2026-16451?
CVE-2026-16451 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-16451?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16451, 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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