CVE-2026-38426

High

Published: 27 May 2026

Published

27 May 2026

Modified

27 May 2026

KEV Added

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Patch

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CVSS Score v3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS Score 0.0055 41.6th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-38426 is a high-severity Classic Buffer Overflow (CWE-120) vulnerability. Its CVSS base score is 7.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 41.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

No EU or UK CSIRT advisories indexed for this CVE.

Vulnerability details

Buffer Overflow vulnerability in arendst Tasmota v.15.3.0.3 and before allows a remote attacker to execute arbitrary code via the xdrv_10_scripter.ino, fetch_jpg(), jpg_task.boundary[40], strcpy() function.

CWE(s): CWE-120

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Remote buffer overflow in public-facing Tasmota web/firmware component (fetch_jpg via strcpy) directly enables arbitrary code execution against an exposed application.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1