CVE-2026-80233

HIGHPre-NVD 7.27.2—
EchelonGraph scoreHIGH confidence

Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-26. a secondary CVSS source baseline 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.2Exploit: None knownExposed: 0

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

CAYIN CMS-WS, CMS-SE, and SMP series products developed by CAYIN Technology have an Arbitrary File Upload vulnerability. Privileged remote attackers can upload and execute web shells backdoors, thereby enabling arbitrary code execution on the server.

CVSS v3
7.2
EG Score
7.2(high)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity72% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

August 26, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 26, 2026
No patch confirmed yet. Sources: cert.
cert

CAYIN Technology｜CAYIN CMS-WS/CMS-SE/SMP - Arbitrary File Upload-TWCERT/CC Taiwan Computer Emergency Response Team/Coordination Center

https://www.twcert.org.tw/en/cp-139-11135-189f7-2.html
cert

鎧應科技｜CMS-WS/CMS-SE/SMP - Arbitrary File Upload-TWCERT/CC台灣電腦網路危機處理暨協調中心|企業資安通報協處|資安情資分享|漏洞通報|資安聯盟|資安電子報

https://www.twcert.org.tw/tw/cp-132-11129-4a040-1.html

Vendor Advisories for CVE-2026-80233(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 15× in last 7d / 15× 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. 2026-08-29 13:12 UTCGHSA enrichment
  2. 2026-08-28 23:59 UTCEG score recompute
  3. 2026-08-28 23:59 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-28 08:35 UTCGHSA enrichment
  6. 2026-08-27 19:24 UTCEG score recompute
  7. 2026-08-27 19:24 UTCGHSA enrichment
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-27 06:12 UTCEG score recompute
  10. 2026-08-27 06:12 UTCGHSA enrichment
  11. 2026-08-26 15:54 UTCEG score recompute
  12. 2026-08-26 14:47 UTCEPSS rescore
  13. 2026-08-26 14:08 UTCEG score recompute
  14. 2026-08-26 08:29 UTCEG score recompute
  15. 2026-08-26 08:28 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-80233?
CVE-2026-80233 is a high vulnerability published on August 26, 2026. CAYIN CMS-WS, CMS-SE, and SMP series products developed by CAYIN Technology have an Arbitrary File Upload vulnerability. Privileged remote attackers can upload and execute web shells backdoors, thereby enabling arbitrary code execution on the server.
When was CVE-2026-80233 disclosed?
CVE-2026-80233 was first published in the National Vulnerability Database on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80233 actively exploited?
CVE-2026-80233 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 53.1% of all scored CVEs.
What is the CVSS score of CVE-2026-80233?
CVE-2026-80233 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-80233?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80233, 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

Explore the affected products and dependency analysis for CVE-2026-80233

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