16 July 2026
Reference: CVE-2026-55944
1. What is being reported?
The vulnerability involves how Microsoft Dynamics NAV handles certain data it receives. If the data is manipulated by an attacker, it can trick the system into running malicious code over the internet without any authentication.
2. What this means in plain English
For small organisations using Microsoft Dynamics NAV, this means attackers could potentially take control of your system, access sensitive information, or cause operational problems without your knowledge.
3. Could this affect a small business?
If your organisation uses Microsoft Dynamics NAV, you could be at risk. If you do not use this software, this vulnerability does not affect you.
4. What to do now
- Contact your IT provider or software supplier immediately to check if updates or patches are available for Microsoft Dynamics NAV.
- Apply any recommended security updates as soon as possible to protect your systems.
- Ensure your network has appropriate protections, such as firewalls, to limit exposure to external threats.
- Review your backup procedures to make sure your important data is safely stored and can be restored if needed.
5. Ask your IT provider
Has the Microsoft Dynamics NAV vulnerability CVE-2026-55944 been patched on our systems, and what steps have been taken to protect us from remote code execution attacks?
6. Bottom line
If you use Microsoft Dynamics NAV, act quickly to apply security updates to keep your business safe from serious cyberattacks.
Information based on CISA KEV, NVD, and reputable security reporting.