CVE-2026-55944Patch(microsoft / dynamics_nav)

LOWCVSS 9.8 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft dynamics_nav systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Deserialization of untrusted data in Microsoft Dynamics NAV allows an unauthorized attacker to execute code over a network.

microsoft CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Patch / fix

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55944

Weakness type (CWE)

CWE-502

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

dynamics_nav

Threat summary

Patch or workaround signal is available
5 mentions across 4 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 3 signals
Technical details provided in 5 signals
Disclosure: 2 classified signals
General: 1 classified signal
Peaked 1d ago at 2 mentions (2026-07-22); latest day: 1
5 total mentions across 4 days

Affected systems

Vendors

microsoft

Products

dynamics_nav

1 version affected across 1 product

Deep dive

Activity timeline5 mentions / 4d

Signal classification3 categories

Patch

240.0%

Disclosure

240.0%

General

120.0%

Referenced assets5 URLs

By indicator

Classification over time

Date	Total	Labels

2026-07-15	1	Patch1
2026-07-20	1	Patch1
2026-07-22	2	Disclosure2
2026-08-13	1	General1

Full discourse5 posts

كاسبر سكاي@KasperskyDev90d
Disclosure
⚠️ ثغرة تنفيذ كود عن بُعد بلا مصادقة في منتجات ميكروسوفت الخاصة بالأعمال. المعرّف : CVE-2026-55944 الخطورة : 9.8 (CVSS) - Critical المتأثر : Dynamics NAV & 365 Business Central (On-Premises) الحل : July 2026 Patch Tuesday #Dynamics365 #CVE202655944
Post summary
Announces a critical remote‑code‑execution vulnerability (CVE‑2026‑55944) affecting Dynamics NAV & 365 Business Central, with a patch scheduled for July 2026 Patch Tuesday.
01000346
39.9K followersView on X
Brad@dvlprlife92d
Patch
If you're running NAV2018 - Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Code Execution Vulnerability Release Notes: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55944 HotFix: https://www.microsoft.com/en-us/download/details.aspx?id=108720 #msdyn365bc #businesscentral
Post summary
Advisory for CVE-2026-55944 affecting Microsoft Dynamics NAV2018 and Business Central (On Premises) customers, offering release notes and a hotfix download to remediate a remote code execution vulnerability.
00001131
469 followersView on X
IntegSec@integ_sec68d
General
CVE-2026-55944: Microsoft Dynamics NAV Deserialization Bug - What It Means for Your Business and How to Respond https://hubs.li/Q04sVdP40
Post summary
Only the CVE and a general reference to a deserialization bug are mentioned; details such as PoC, exploit, or patch are absent.
0000030
32 followersView on X
takenaka hiroya@Joe_Biden_ja90d
Disclosure
Dynamics 365 Business Central/NAVのCriticalなデシリアライズRCE、CVE-2026-55944について記事を公開しました。深刻度9.8の脆弱性です。早めの対応をご検討ください。 https://cve.autoarticles.net/cve/CVE-2026-55944
Post summary
The article announces the discovery of a critical deserialization RCE (CVE‑2026‑55944) affecting Dynamics 365 Business Central/NAV, assigns it a severity of 9.8, and urges prompt remediation.
0000056
561 followersView on X
Windows Forum@windowsforum97d
Patch
🪟 Dynamics NAV has a 9.8 unauthenticated RCE via a crafted login request. Patch now—because “just logging in” should not be a remote takeover strategy. https://windowsforum.com/threads/cve-2026-55944-fix-patch-dynamics-nav-rce-before-exploitation.438763/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #RemoteCodeExecution #BusinessCentral #DynamicsNav #Cve202655944 https://t.co/BDODyuLomE
Post summary
The post alerts that Dynamics NAV has a critical unauthenticated RCE (CVE‑2026‑55944) and urges users to apply the patch immediately to prevent potential exploitation.
0000016
1.2K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	microsoft	dynamics_nav	2018	-	-

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What researchers are saying

CVE-2026-55944

Brad[verified]@dvlprlifePatch

Advisory for CVE-2026-55944 affecting Microsoft Dynamics NAV2018 and Business Central (On Premises) customers, offering release notes and a hotfix download to remediate a remote code execution vulnerability.

IntegSec[verified]@integ_secGeneral

Only the CVE and a general reference to a deserialization bug are mentioned; details such as PoC, exploit, or patch are absent.

Windows Forum[verified]@windowsforumPatch

The post alerts that Dynamics NAV has a critical unauthenticated RCE (CVE‑2026‑55944) and urges users to apply the patch immediately to prevent potential exploitation.

كاسبر سكاي@KasperskyDevDisclosure

Announces a critical remote‑code‑execution vulnerability (CVE‑2026‑55944) affecting Dynamics NAV & 365 Business Central, with a patch scheduled for July 2026 Patch Tuesday.

takenaka hiroya@Joe_Biden_jaDisclosure

The article announces the discovery of a critical deserialization RCE (CVE‑2026‑55944) affecting Dynamics 365 Business Central/NAV, assigns it a severity of 9.8, and urges prompt remediation.