How severe is CVE-2026-63508?

CVE-2026-63508 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 none.

Is CVE-2026-63508 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-63508?

CVE-2026-63508 affects Microsoft Planetary Computer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-63508?

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-2026-63508 published?

CVE-2026-63508 was published on 2026-08-07.

CVE-2026-63508

CVE-2026-63508 is a critical-severity vulnerability in Microsoft Planetary Computer 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Microsoft Planetary Computer
Published: 2026-08-07
Last modified: 2026-08-07

Description

Missing authentication for critical function in Microsoft Planetary Computer Pro allows an unauthorized attacker to elevate privileges over a network.

Frequently asked questions

What is CVE-2026-63508?: Missing authentication for critical function in Microsoft Planetary Computer Pro allows an unauthorized attacker to elevate privileges over a network.
How severe is CVE-2026-63508?: CVE-2026-63508 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 none.
Is CVE-2026-63508 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-63508?: CVE-2026-63508 affects Microsoft Planetary Computer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-63508?: 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-2026-63508 published?: CVE-2026-63508 was published on 2026-08-07.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63508

Affected products (1)

cpe:2.3:a:microsoft:planetary_computer:-:*:*:*:pro:*:*:*

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