[NEW] [high] Microsoft Dynamics NAV: Vulnerability allows code execution

highCVE-2026-55944

A remote, anonymous attacker can exploit a vulnerability in Microsoft Dynamics NAV to execute arbitrary code.

CSIRTS triage

vendor: Microsoft product: Dynamics NAV Remote code execution

What: A vulnerability allows a remote attacker to execute arbitrary code in Microsoft Dynamics NAV.
Who is affected: Deployments of Microsoft Dynamics NAV are affected.
Urgency: Remediation is high priority due to the potential for remote code execution.
Action: Apply the latest security updates for Microsoft Dynamics NAV.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: high
Published: 2026-07-15
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2325

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Moderate exploitation riskCVE-2026-559441.3% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 67% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-55944	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Microsoft Dynamics NAV

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-55944: Deserialization of untrusted data in Microsoft Dynamics NAV allows an unauthorized attacker to…nvd · 2026-07-14
criticalCVE-2026-55944: Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Code E…msrc · 2026-07-14