CVE & CISA-KEV Catalog

CVE-2021-22816

HIGH
7.5
CVSS v3
NVD

Description

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

CWE-754

How to fix

Remediation Available
scadapack 312e firmwareNVD
Affected:< 8.19.1Fixed in:8.19.1CVE-2021-22816derived from NVD
scadapack 313e firmwareNVD
Affected:< 8.19.1Fixed in:8.19.1CVE-2021-22816derived from NVD
scadapack 314e firmwareNVD
Affected:< 8.19.1Fixed in:8.19.1CVE-2021-22816derived from NVD
scadapack 330e firmwareNVD
Affected:< 8.19.1Fixed in:8.19.1CVE-2021-22816derived from NVD
scadapack 333e firmwareNVD
Affected:< 8.19.1Fixed in:8.19.1CVE-2021-22816derived from NVD
scadapack 334e firmwareNVD
Affected:< 8.19.1Fixed in:8.19.1CVE-2021-22816derived from NVD
scadapack 337e firmwareNVD
Affected:< 8.19.1Fixed in:8.19.1CVE-2021-22816derived from NVD
scadapack 350e firmwareNVD
Affected:< 8.19.1Fixed in:8.19.1CVE-2021-22816derived from NVD
scadapack 357e firmwareNVD
Affected:< 8.19.1Fixed in:8.19.1CVE-2021-22816derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

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

Exploit Intelligence

0.95%probability of exploitation in 30 days
57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Related Vulnerabilities

Other CWE-754 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2024-4367High8.873%-Fix
CVE-2022-39288High7.559%-Fix
CVE-2023-30591High7.554%--
CVE-2023-41993High8.829%KEVFix
CVE-2024-43044High8.829%-Fix
CVE-2024-3393High7.527%KEVFix
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CVE-2021-22816 severity badge

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.