CVE-2026-51270

✕ Withdrawn — historical dataHIGHPre-NVD 8.8
8.8CVSS

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.

CVSS v3
8.8
EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EPSS PROB
—
EPSS %ILE
—
KEV
—Not applicable: this CVE ID was withdrawn

Published

July 28, 2026

Last Modified

July 30, 2026

References (2)

Frequently asked(4)

What is CVE-2026-51270?
CVE-2026-51270 is a rejected CVE ID: its record was withdrawn on July 31, 2026 and no longer describes a vulnerability. Reason given: 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 Reason: This record was withdrawn by its CNA.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.
When was the CVE record for CVE-2026-51270 published?
The CVE record for CVE-2026-51270 was published on July 28, 2026. EchelonGraph's copy of the record carries a last-modified date of July 30, 2026; the record at its source may have been updated since.
What is the CVSS score of CVE-2026-51270?
CVE-2026-51270 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51270?
There is nothing to remediate under CVE-2026-51270: it is a rejected (withdrawn) CVE ID and no longer describes a vulnerability.