CVE-2025-63927: iec104 Heap Overflow — Exploit

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.

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CVSS v3.1 Score

4.0

MEDIUM

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

Weakness Type (CWE)

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
airpig2011	iec104	< 2019-07-08

References

Exploits

https://github.com/airpig2011/IEC104/issues/20 https://songsong.host/mybugs/CVE-2025-63927.html

Frequently Asked Questions

What is CVE-2025-63927? +

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. It has a CVSS v3.1 base score of 4.0 (MEDIUM).

How severe is CVE-2025-63927? +

CVE-2025-63927 has a CVSS v3.1 score of 4.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-63927? +

CVE-2025-63927 affects products from airpig2011, specifically: iec104. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-63927? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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