# CVE-2026-40434: Anviz CrossChex Standard lacks source verification in the client/server channel, enabling TCP packet injection by an…

Source: https://junglewise.ai/threats/cve-2026-40434-anviz-crosschex-standard-lacks-source-verification-in-the-client  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-17  
License: CC BY 4.0 with a link back

CVE-2026-40434 · Severity: high · CVSS 8.1 · Published 2026-04-17

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.

Vendors: [Anviz](https://junglewise.ai/threats/vendors/anviz).

## Quick answers

**Is CVE-2026-40434 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40434 being exploited in the wild.

**How severe is CVE-2026-40434?** High severity, with a CVSS score of 8.1, published 17 April 2026.

**Which products and versions are affected?** Anviz Crosschex Standard. The advisory does not name versions.

**Is there a fix for CVE-2026-40434?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-40434?** Check whether you run Anviz Crosschex Standard. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Anviz Crosschex Standard

## Related threats

- [Anviz CrossChex Standard is vulnerable when an attacker manipulates the TDS7 PreLogin to disable encryption, causing…](https://junglewise.ai/threats/cve-2026-32650-anviz-crosschex-standard-is-vulnerable-when-an-attacker)