Which versions of Micropython are affected by CVE-2026-1998?

CVE-2026-1998 is a low-severity vulnerability in micropython (CVSS 3.3). The limited severity suggests constrained impact, typically requiring specific conditions or local access for exploitation.. A patch is available.

Is there a public PoC exploit available for CVE-2026-1998?

Yes, a public proof-of-concept exploit is available for CVE-2026-1998. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-1998?

During next maintenance window: Apply vendor patches when convenient. Vendor patch is available.

Micropython CVE-2026-1998

Q: What is the CVSS score of CVE-2026-1998?

CVE-2026-1998 has a CVSS 4.0 base score of 1.9 (Low). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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%.

LOW

Buffer Overflow (CWE-119)

2026-02-06 cna@vuldb.com

Buffer Overflow Micropython

1.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

1.9 LOW

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

3.3 (LOW) 1.9 (LOW)

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 17, 2026 - 19:15 vuln.today

Public exploit code

Patch released

Feb 17, 2026 - 19:15 nvd

Patch available

CVE Published

Feb 06, 2026 - 07:16 nvd

LOW 3.3

DescriptionCVE.org

A flaw has been found in micropython up to 1.27.0. This vulnerability affects the function mp_import_all of the file py/runtime.c. This manipulation causes memory corruption. The attack needs to be launched locally. The exploit has been published and may be used. Patch name: 570744d06c5ba9dba59b4c3f432ca4f0abd396b6. It is suggested to install a patch to address this issue.

AnalysisAI

A flaw has been found in micropython up to 1.27.0. This vulnerability affects the function mp_import_all of the file py/runtime.c. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 3.3 (LOW). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

During next maintenance window: Apply vendor patches when convenient. …

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CVE-2026-1998 vulnerability details – vuln.today

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