What is the CVSS score of CVE-2025-27840?

CVE-2025-27840 has a CVSS 3.1 base score of 6.8 (Medium). CVSS vector: CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L. EPSS exploitation probability: 0.3%.

Which versions of Esp32 Firmware are affected by CVE-2025-27840?

CVE-2025-27840 presents notable security risk rated CVSS 6.8. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available.

Is there a public PoC exploit available for CVE-2025-27840?

Yes, a public proof-of-concept exploit is available for CVE-2025-27840. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2025-27840?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Esp32 Firmware CVE-2025-27840

MEDIUM

Hidden Functionality (CWE-912)

2025-03-08 cve@mitre.org

Information Disclosure Esp32 Firmware

6.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.8 MEDIUM

AV:P/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L

Attack Vector

Physical

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:30 vuln.today

PoC Detected

Mar 12, 2025 - 14:58 vuln.today

Public exploit code

CVE Published

Mar 08, 2025 - 20:15 nvd

MEDIUM 6.8

DescriptionCVE.org

Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory).

AnalysisAI

Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory). Rated medium severity (CVSS 6.8). Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-912. Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory). Affected products include: Espressif Esp32 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

CVE-2025-27840 vulnerability details – vuln.today

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Esp32 Firmware CVE-2025-27840

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code