How severe is CVE-2026-69836?

CVE-2026-69836 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-69836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-69836?

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.

When was CVE-2026-69836 published?

CVE-2026-69836 was published on 2026-08-20 and last updated on 2026-08-22.

CVE-2026-69836

CVE-2026-69836 is a critical-severity vulnerability with a CVSS 3.x base score of 10.0. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Published: 2026-08-20
Last modified: 2026-08-22

Description

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

Frequently asked questions

What is CVE-2026-69836?: Deserialization of untrusted data in Microsoft Entra ID allows an unauthorized attacker to execute code over a network.
How severe is CVE-2026-69836?: CVE-2026-69836 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-69836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-69836?: 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.
When was CVE-2026-69836 published?: CVE-2026-69836 was published on 2026-08-20 and last updated on 2026-08-22.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69836

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