CVE-2026-21532
CVE-2026-21532 is a high-severity vulnerability in Microsoft Azure Functions with a CVSS 3.x base score of 8.2. 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-200.
Key facts
- Severity: High (CVSS 3.x base score 8.2)
- EPSS exploit prediction: 1% (53rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-5521
- Weakness: CWE-200
- Affected product: Microsoft Azure Functions
- Published:
- Last modified:
Description
Azure Function Information Disclosure Vulnerability
Frequently asked questions
- What is CVE-2026-21532?
- Azure Function Information Disclosure Vulnerability
- How severe is CVE-2026-21532?
- CVE-2026-21532 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
- Is CVE-2026-21532 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-21532?
- CVE-2026-21532 affects Microsoft Azure Functions. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-21532?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-21532 have an EU (EUVD) identifier?
- Yes. CVE-2026-21532 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5521.
- When was CVE-2026-21532 published?
- CVE-2026-21532 was published on 2026-02-05 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:microsoft:azure_functions:-:*:*:*:*:*:*:*
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