CVE-2026-51272

✕ Withdrawn — historical dataCRITICALPre-NVD 9.8Elevated
9.8CVSS
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

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

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Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.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
0.4%
EPSS %ILE
35th
KEV
Not listed

Published

July 30, 2026

Last Modified

July 30, 2026

Advisory Details (2)

Auto-updated Oct 1, 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 3× in last 7d / 10× 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. 2026-10-04 06:58 UTCGHSA enrichment
  2. 2026-10-01 03:32 UTCEG score recompute
  3. 2026-10-01 03:32 UTCGHSA enrichment
  4. 2026-09-27 19:34 UTCGHSA enrichment
  5. 2026-09-23 21:47 UTCGHSA enrichment
  6. 2026-09-20 11:15 UTCGHSA enrichment
  7. 2026-09-17 03:56 UTCGHSA enrichment
  8. 2026-09-14 01:29 UTCGHSA enrichment
  9. 2026-09-10 23:06 UTCGHSA enrichment
  10. 2026-09-07 20:36 UTCGHSA enrichment
  11. 2026-09-04 11:52 UTCGHSA enrichment
  12. 2026-08-29 23:03 UTCGHSA enrichment
  13. 2026-08-25 11:33 UTCGHSA enrichment
  14. 2026-08-22 09:11 UTCGHSA enrichment
  15. 2026-08-19 06:48 UTCGHSA enrichment
  16. 2026-08-16 04:25 UTCGHSA enrichment
  17. 2026-08-13 02:02 UTCGHSA enrichment
  18. 2026-08-09 23:40 UTCGHSA enrichment
  19. 2026-08-06 21:18 UTCGHSA enrichment
  20. 2026-08-03 18:56 UTCEG score recompute
  21. 2026-08-03 18:56 UTCGHSA enrichment
  22. 2026-08-01 04:16 UTCEPSS rescore
  23. 2026-07-31 16:33 UTCEG score recompute▼ 9.80
  24. 2026-07-31 16:33 UTCGHSA enrichment
  25. 2026-07-31 12:35 UTCGHSA enrichment
Show 10 more
  1. 2026-07-31 08:36 UTCGHSA enrichment
  2. 2026-07-31 04:38 UTCGHSA enrichment
  3. 2026-07-31 00:40 UTCEG score recompute
  4. 2026-07-31 00:40 UTCGHSA enrichment
  5. 2026-07-30 20:43 UTCEG score recompute
  6. 2026-07-30 20:07 UTCEG score recompute▲ 9.80
  7. 2026-07-30 20:05 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  8. 2026-07-30 19:29 UTCNVD update
  9. 2026-07-30 17:56 UTCEG score recompute
  10. 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 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 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-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?
No fix for CVE-2026-51272 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-51272 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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