CVE-2026-19853

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-08-24. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

NewSiteServer (NSS) developed by CyberTutor has a Missing Authentication vulnerability. Unauthenticated remote attackers can exploit a specific functionality to send emails to anyone on behalf of the school.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 24, 2026
No patch confirmed yet. Sources: cert.
cert

CyberTutor｜NewSiteServer (NSS) - Missing Authentication-TWCERT/CC Taiwan Computer Emergency Response Team/Coordination Center

https://www.twcert.org.tw/en/cp-139-11121-51e56-2.html
cert

網韻資訊｜NewSiteServer (NSS) 新式校園網站系統 - Missing Authentication-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-132-11117-4f503-1.html

Vendor Advisories for CVE-2026-19853(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 23× in last 7d / 23× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 19:10 UTCEG score recompute
  3. 2026-08-29 19:10 UTCGHSA enrichment
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-28 18:49 UTCGHSA enrichment
  6. 2026-08-27 18:16 UTCEG score recompute
  7. 2026-08-27 18:16 UTCGHSA enrichment
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-26 17:01 UTCEG score recompute
  10. 2026-08-26 17:00 UTCGHSA enrichment
  11. 2026-08-26 14:46 UTCEPSS rescore
  12. 2026-08-26 14:11 UTCEG score recompute
  13. 2026-08-26 14:11 UTCGHSA enrichment
  14. 2026-08-25 13:48 UTCEPSS rescore
  15. 2026-08-25 13:48 UTCEG score recompute
  16. 2026-08-25 13:48 UTCGHSA enrichment
  17. 2026-08-24 13:28 UTCEG score recompute
  18. 2026-08-24 13:28 UTCGHSA enrichment
  19. 2026-08-24 12:59 UTCEG score recompute
  20. 2026-08-24 12:59 UTCGHSA enrichment
  21. 2026-08-24 04:23 UTCEG score recompute
  22. 2026-08-24 03:51 UTCEG score recompute
  23. 2026-08-24 03:50 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-19853?
CVE-2026-19853 is a medium vulnerability published on August 24, 2026. NewSiteServer (NSS) developed by CyberTutor has a Missing Authentication vulnerability. Unauthenticated remote attackers can exploit a specific functionality to send emails to anyone on behalf of the school.
When was CVE-2026-19853 disclosed?
CVE-2026-19853 was first published in the National Vulnerability Database on August 24, 2026, with the most recent update 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-2026-19853 actively exploited?
CVE-2026-19853 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 73.9% of all scored CVEs.
What is the CVSS score of CVE-2026-19853?
CVE-2026-19853 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-19853?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19853, 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-2026-19853

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