CVE-2020-18731 json
A segmentation violation in the Iec104_Deal_FirmUpdate function of IEC104 v1.0 allows attackers to cause a denial of service (DOS).
published 2021-08-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-10648
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
A segmentation violation in the Iec104_Deal_FirmUpdate function of IEC104 v1.0 allows attackers to cause a denial of service (DOS).
Exploit prediction
1.41% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/airpig2011/IEC104/issues/5 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-476 NULL Pointer Dereference
References
-
github.com
/airpig2011/IEC104/issues/5
exploit, third-party-advisory
-
cwe.mitre.org
/data/definitions/476.html
third-party-advisory
Sources
- CVE List CVE-2020-18731
- NVD CVE-2020-18731
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