CVE-2026-40434

HIGHNVD 8.18.1—

8.1

Anviz CrossChex Standard lacks source verification in the client/server channel, enabling TCP packet injection by an attacker on the same network to alter or disrupt application traffic.

CVSS v3: 8.1
EG Score: 8.1(medium)
EPSS: 12.6%
KEV: Not listed

Published

April 17, 2026

Last Modified

May 4, 2026

Advisory Details (3)

Auto-updated May 4, 2026

Patch available. Sources: cisa.

cisa Patch Available

Anviz Multiple Products | CISA

https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-03

generic

Contact Us | Anviz Global

https://www.anviz.com/contact-us.html

generic

CSAF/csaf_files/OT/white/2026/icsa-26-106-03.json at develop · cisagov/CSAF · GitHub

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-03.json

Weakness Classification(1)

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

CWE-940

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 16:52 UTCEG score recompute
2026-05-20 16:52 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-40434?

CVE-2026-40434 is a high vulnerability published on April 17, 2026. Anviz CrossChex Standard lacks source verification in the client/server channel, enabling TCP packet injection by an attacker on the same network to alter or disrupt application traffic.

When was CVE-2026-40434 disclosed?

CVE-2026-40434 was first published in the National Vulnerability Database on April 17, 2026, with the most recent update on May 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-40434 actively exploited?

CVE-2026-40434 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-40434?

CVE-2026-40434 has a CVSS v3 base score of 8.1 (NVD).

How do I remediate CVE-2026-40434?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40434, 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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CVE-2026-40434

📅 Published

🔄 Last Modified

📋 Advisory Details (3)