Which versions of Shelly Pro are affected by CVE-2025-12056?

CVE-2025-12056 presents notable security risk, a out-of-bounds read vulnerability rated CVSS 8.3.

How to fix or mitigate CVE-2025-12056?

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

Shelly Pro CVE-2025-12056

Q: What is the CVSS score of CVE-2025-12056?

CVE-2025-12056 has a CVSS 4.0 base score of 8.3 (High). CVSS vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

HIGH

Out-of-bounds Read (CWE-125)

2025-11-19 prodsec@nozominetworks.com

Buffer Overflow Information Disclosure

8.3

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

8.3 HIGH

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:23 vuln.today

CVE Published

Nov 19, 2025 - 07:15 nvd

HIGH 8.3

DescriptionCVE.org

Out-of-bounds Read in Shelly Pro 3EM (before v1.4.4) allows Overread Buffers.

AnalysisAI

Out-of-bounds Read in Shelly Pro 3EM (before v1.4.4) allows Overread Buffers. Rated high severity (CVSS 8.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. Out-of-bounds Read in Shelly Pro 3EM (before v1.4.4) allows Overread Buffers.

Affected ProductsAI

See vendor advisory for affected versions.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.