How severe is CVE-2026-42833?

CVE-2026-42833 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-42833 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42833?

CVE-2026-42833 affects Microsoft Dynamics 365. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42833?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-42833 have an EU (EUVD) identifier?

Yes. CVE-2026-42833 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29713.

When was CVE-2026-42833 published?

CVE-2026-42833 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-42833

CVE-2026-42833 is a critical-severity vulnerability in Microsoft Dynamics 365 with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-250.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29713
Weakness: CWE-250
Affected product: Microsoft Dynamics 365
Published: 2026-05-12
Last modified: 2026-06-17

Description

Improper control of generation of code ('code injection') in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute code over a network.

Frequently asked questions

What is CVE-2026-42833?: Improper control of generation of code ('code injection') in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute code over a network.
How severe is CVE-2026-42833?: CVE-2026-42833 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-42833 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42833?: CVE-2026-42833 affects Microsoft Dynamics 365. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42833?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-42833 have an EU (EUVD) identifier?: Yes. CVE-2026-42833 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29713.
When was CVE-2026-42833 published?: CVE-2026-42833 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42833

Affected products (1)

cpe:2.3:a:microsoft:dynamics_365:*:*:*:*:on-premises:*:*:*

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