CVE-2026-40556

✕ Withdrawn — historical dataUNRATEDCVSS · not yet scored
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: —CVSS v2: —Exploit: None knownExposed: 0

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

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

CVSS v3
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EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EG Score
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EG Risk
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EPSS PROB
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EPSS %ILE
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KEV
Not listed

Published

April 28, 2026

Last Modified

April 29, 2026

Vendor Advisories for CVE-2026-40556(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 0× in last 7d / 0× 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. 2026-08-16 05:33 UTCGHSA enrichment
  2. 2026-08-12 17:38 UTCGHSA enrichment
  3. 2026-08-09 03:08 UTCGHSA enrichment
  4. 2026-08-05 22:46 UTCGHSA enrichment
  5. 2026-08-02 05:58 UTCEG score recompute
  6. 2026-08-02 05:58 UTCGHSA enrichment
  7. 2026-07-23 03:11 UTCEG score recompute
  8. 2026-06-14 09:44 UTCGHSA enrichment
  9. 2026-06-10 09:04 UTCGHSA enrichment
  10. 2026-06-07 09:48 UTCGHSA enrichment
  11. 2026-06-04 10:31 UTCGHSA enrichment
  12. 2026-06-01 11:14 UTCGHSA enrichment
  13. 2026-05-20 15:19 UTCEG score recompute
  14. 2026-05-20 15:19 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(3)

What is CVE-2026-40556?
CVE-2026-40556 is a publicly disclosed vulnerability published on April 28, 2026. Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
When was CVE-2026-40556 disclosed?
CVE-2026-40556 was first published in the National Vulnerability Database on April 28, 2026, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
How do I remediate CVE-2026-40556?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40556, 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-2026-40556

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