CVE-2026-51272

✕ Withdrawn — historical dataCRITICALPre-NVD 9.8Elevated
9.8CVSS
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In schreibfaul1 ESP32-audioI2S 3.4.5, a heap-based buffer overflow vulnerability exists in the latinToUTF8() character encoding conversion function. The function calculates required buffer size by simply doubling input length and reallocates ps_ptr heap buffer without strict boundary validation. Malicious oversized input can trigger insufficient buffer allocation and out-of-bounds write during Latin-1 to UTF-8 conversion, leading to code execution, information disclosure, denial of service or privilege escalation.

CVSS v3
9.8
EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EG Score
—
EG Risk
—
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

July 30, 2026

Last Modified

July 30, 2026

Advisory Details (2)

Auto-updated Aug 20, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

CVE-2026-51272 · GitHub

https://gist.github.com/programmervuln/5d1388bb85dfaf2e7e2700c5a2bceef5
generic

ESP32-audioI2S/src/Audio.cpp at master · schreibfaul1/ESP32-audioI2S · GitHub

https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/src/Audio.cpp

Vendor Advisories for CVE-2026-51272(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-19 06:48 UTCGHSA enrichment
  2. 2026-08-16 04:25 UTCGHSA enrichment
  3. 2026-08-13 02:02 UTCGHSA enrichment
  4. 2026-08-09 23:40 UTCGHSA enrichment
  5. 2026-08-06 21:18 UTCGHSA enrichment
  6. 2026-08-03 18:56 UTCEG score recompute
  7. 2026-08-03 18:56 UTCGHSA enrichment
  8. 2026-08-01 04:16 UTCEPSS rescore
  9. 2026-07-31 16:33 UTCEG score recompute▼ 9.80
  10. 2026-07-31 16:33 UTCGHSA enrichment
  11. 2026-07-31 12:35 UTCGHSA enrichment
  12. 2026-07-31 08:36 UTCGHSA enrichment
  13. 2026-07-31 04:38 UTCGHSA enrichment
  14. 2026-07-31 00:40 UTCEG score recompute
  15. 2026-07-31 00:40 UTCGHSA enrichment
  16. 2026-07-30 20:43 UTCEG score recompute
  17. 2026-07-30 20:07 UTCEG score recompute▲ 9.80
  18. 2026-07-30 20:05 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  19. 2026-07-30 19:29 UTCNVD update
  20. 2026-07-30 17:56 UTCEG score recompute
  21. 2026-07-30 17:56 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51272?
CVE-2026-51272 is a critical vulnerability published on July 30, 2026. In schreibfaul1 ESP32-audioI2S 3.4.5, a heap-based buffer overflow vulnerability exists in the latinToUTF8() character encoding conversion function. The function calculates required buffer size by simply doubling input length and reallocates ps_ptr heap buffer without strict boundary validation.…
When was CVE-2026-51272 disclosed?
CVE-2026-51272 was first published in the National Vulnerability Database on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51272 actively exploited?
CVE-2026-51272 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.0% of all scored CVEs.
What is the CVSS score of CVE-2026-51272?
CVE-2026-51272 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51272?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51272, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-51272

Explore →

Is Your Infrastructure Affected by CVE-2026-51272?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs