How severe is CVE-2021-26280?

CVE-2021-26280 has a CVSS 3.x base score of 7.9, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2021-26280 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26280?

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-2021-26280 have an EU (EUVD) identifier?

Yes. CVE-2021-26280 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-13092.

When was CVE-2021-26280 published?

CVE-2021-26280 was published on 2024-12-17 and last updated on 2026-06-17.

CVE-2021-26280

CVE-2021-26280 is a high-severity vulnerability with a CVSS 3.x base score of 7.9. 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: High (CVSS 3.x base score 7.9)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-13092
Weakness: CWE-306
Published: 2024-12-17
Last modified: 2026-06-17

Description

Locally installed application can bypass the permission check and perform system operations that require permission.

Frequently asked questions

What is CVE-2021-26280?: Locally installed application can bypass the permission check and perform system operations that require permission.
How severe is CVE-2021-26280?: CVE-2021-26280 has a CVSS 3.x base score of 7.9, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2021-26280 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2021-26280?: 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-2021-26280 have an EU (EUVD) identifier?: Yes. CVE-2021-26280 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-13092.
When was CVE-2021-26280 published?: CVE-2021-26280 was published on 2024-12-17 and last updated on 2026-06-17.

References

https://www.vivo.com/en/support/security-advisory-detail?id=6

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities

CVE-2026-54309 — Critical (CVSS 10.0): n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, when @n8n/mcp-browser is run in HTTP…
CVE-2026-50242 — Critical (CVSS 10.0): In JetBrains Hub before 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, 2024.2.148429…
CVE-2026-49257 — Critical (CVSS 10.0): mcp-pinot is a Python-based Model Context Protocol (MCP) server for interacting with Apache Pinot. In versions 3.0.1…
CVE-2026-46846 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Security Framework).…
CVE-2026-46803 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Security Framework).…
CVE-2026-46800 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites).…

Browse all CWE-306 (Missing Authentication for Critical Function) vulnerabilities →