How severe is CVE-2025-27803?

CVE-2025-27803 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2025-27803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-27803?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-27803 have an EU (EUVD) identifier?

Yes. CVE-2025-27803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16053.

When was CVE-2025-27803 published?

CVE-2025-27803 was published on 2025-05-21 and last updated on 2026-06-17.

CVE-2025-27803

CVE-2025-27803 is a medium-severity vulnerability with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-16053
Weakness: CWE-306
Published: 2025-05-21
Last modified: 2026-06-17

Description

The devices do not implement any authentication for the web interface or the MQTT server. An attacker who has network access to the device immediately gets administrative access to the devices and can perform arbitrary administrative actions and reconfigure the devices or potentially gain access to sensitive data.

Frequently asked questions

What is CVE-2025-27803?: The devices do not implement any authentication for the web interface or the MQTT server. An attacker who has network access to the device immediately gets administrative access to the devices and can perform arbitrary administrative actions and reconfigure the devices or potentially gain access to sensitive data.
How severe is CVE-2025-27803?: CVE-2025-27803 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2025-27803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-27803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-27803 have an EU (EUVD) identifier?: Yes. CVE-2025-27803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16053.
When was CVE-2025-27803 published?: CVE-2025-27803 was published on 2025-05-21 and last updated on 2026-06-17.

References

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

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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).…

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