Buffer overflow in Airpig2011 Iec104
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (8.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/airpig2011/IEC104/issues/20 (Exploit)
- songsong.host/mybugs/CVE-2025-63927.html (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-63927?
- CVE-2025-63927 is a medium-severity vulnerability in Airpig2011 Iec104, classified under Heap-based Buffer Overflow. CVSS score: 4.0/10. Published 2025-11-12.
- How severe is CVE-2025-63927?
- Medium severity. CVSS v3 base score is 4.0 out of 10.