CVE-2026-51270

Heap‑Based Buffer Overflow in ESP32‑audioI2S Leading to Remote Code Execution

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Published Jul 28, 2026 CVSS n/a EPSS n/a KEV · Not listed
Description
DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References

No reference.

History
Type Values Removed Values Added
Title Heap‑Based Buffer Overflow in ESP32‑audioI2S Leading to Remote Code Execution
Type Values Removed Values Added
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}
Type Values Removed Values Added
Description schreibfaul1 ESP32-audioI2S 3.4.5 has a heap-based buffer overflow vulnerability in the htmlToUTF8() HTML entity decoding function. The function parses attacker-controlled malicious HTML entities and uses memmove and memcpy to rearrange string content without validating buffer remaining size and boundary limits. Crafted oversized HTML entity strings can trigger heap out-of-bounds write, allowing remote code execution, memory information leakage, service crash or privilege escalation. DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none.
References
Type Values Removed Values Added
Weaknesses CWE-122
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}
Type Values Removed Values Added
First Time appeared Schreibfaul1
Schreibfaul1 esp32-audioi2s
Vendors & Products Schreibfaul1
Schreibfaul1 esp32-audioi2s
Type Values Removed Values Added
Description schreibfaul1 ESP32-audioI2S 3.4.5 has a heap-based buffer overflow vulnerability in the htmlToUTF8() HTML entity decoding function. The function parses attacker-controlled malicious HTML entities and uses memmove and memcpy to rearrange string content without validating buffer remaining size and boundary limits. Crafted oversized HTML entity strings can trigger heap out-of-bounds write, allowing remote code execution, memory information leakage, service crash or privilege escalation.
References
Earlier changes (1)
Weaknesses

No weakness.

Sources

Status
REJECTED
Assigner
mitre
Published
Updated
Jul 31, 2026, 2:34 PM
Reserved
Jun 7, 2026, 12:00 AM

View source JSON

Updated

JSON

Status
Rejected
Published
Jul 28, 2026, 4:18 PM
Modified
Jul 31, 2026, 3:16 PM

View source JSON

No data.

No data.