What is CVE-2026-40434?

CVE-2026-40434 is a high-severity vulnerability in Anviz Crosschex Standard, classified under Improper Verification of Source of a Communication Channel. CVSS score: 8.1/10. Published 2026-04-17.

How severe is CVE-2026-40434?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Anviz Crosschex Standard

CVE-2026-40434

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.

EPSS: 0.000 (12.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Anviz Crosschex Standard — versions All versions
Anviz Crosschex_standard

Weakness classification (CWE)

CWE-940 — Improper Verification of Source of a Communication Channel

References

ics-cert@hq.dhs.gov (Third Party Advisory)
ics-cert@hq.dhs.gov (Product)
ics-cert@hq.dhs.gov (US Government Resource)

Frequently asked questions

What is CVE-2026-40434?: CVE-2026-40434 is a high-severity vulnerability in Anviz Crosschex Standard, classified under Improper Verification of Source of a Communication Channel. CVSS score: 8.1/10. Published 2026-04-17.
How severe is CVE-2026-40434?: High severity. CVSS v3 base score is 8.1 out of 10.