CVE-2021-22816 json
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause a Denial of Service of the RTU when r…
published 2022-01-28 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9951
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause a Denial of Service of the RTU when receiving a specially crafted request over Modbus, and the RTU is configured as a Modbus server. Affected Products: SCADAPack 312E, 313E, 314E, 330E, 333E, 334E, 337E, 350E and 357E RTUs with firmware V8.18.1 and prior
Patch / fix
- schneider-electric scadapack_312e_firmware 8.19.1
- schneider-electric scadapack_313e_firmware 8.19.1
- schneider-electric scadapack_314e_firmware 8.19.1
- schneider-electric scadapack_330e_firmware 8.19.1
- schneider-electric scadapack_333e_firmware 8.19.1
- schneider-electric scadapack_334e_firmware 8.19.1
- schneider-electric scadapack_337e_firmware 8.19.1
- schneider-electric scadapack_350e_firmware 8.19.1
- schneider-electric scadapack_357e_firmware 8.19.1
Exploit prediction
0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).
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 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Classification
- Weakness
-
- CWE-754 Improper Check for Unusual or Exceptional Conditions
References
Sources
- CVE List CVE-2021-22816
- NVD CVE-2021-22816
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