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Vulnerability record · CVE-2025-63927 · published 12 November 2025

CVE-2025-63927: Airpig2011 iec104 heap-based buffer overflow vulnerability

AAirpig2011 · Iec104

A heap-use-after-free vulnerability exists in airpig2011 IEC104 thru Commit be6d841 (2019-07-08). During multi-threaded client execution, the function Iec10x_Scheduled can access memory that has already been freed, potentially causing program crashes or undefined behavior. This may be exploited to trigger a denial-of-service or memory corruption.

4.0 CVSS 3.1 Medium EPSS 0.19% · top 91.8% CWE-122 · Heap-based buffer overflow
4.0CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A heap-use-after-free vulnerability exists in airpig2011 IEC104 thru Commit be6d841 (2019-07-08). During multi-threaded client execution, the function Iec10x_Scheduled can access memory that has already been freed, potentially causing program crashes or undefined behavior. This may be exploited to trigger a denial-of-service or memory corruption.

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/airpig2011/IEC104/issues/20 Exploit
https://songsong.host/mybugs/CVE-2025-63927.html ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-63927), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.