How severe is CVE-2022-31803?

CVE-2022-31803 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2022-31803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-31803?

CVE-2022-31803 affects Codesys Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-31803?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-31803 published?

CVE-2022-31803 was published on 2022-06-24 and last updated on 2026-06-17.

CVE-2022-31803

CVE-2022-31803 is a medium-severity vulnerability in Codesys Gateway with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Codesys Gateway
Published: 2022-06-24
Last modified: 2026-06-17

Description

In CODESYS Gateway Server V2 an insufficient check for the activity of TCP client connections allows an unauthenticated attacker to consume all available TCP connections and prevent legitimate users or clients from establishing a new connection to the CODESYS Gateway Server V2. Existing connections are not affected and therefore remain intact.

Frequently asked questions

What is CVE-2022-31803?: In CODESYS Gateway Server V2 an insufficient check for the activity of TCP client connections allows an unauthenticated attacker to consume all available TCP connections and prevent legitimate users or clients from establishing a new connection to the CODESYS Gateway Server V2. Existing connections are not affected and therefore remain intact.
How severe is CVE-2022-31803?: CVE-2022-31803 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2022-31803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-31803?: CVE-2022-31803 affects Codesys Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-31803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-31803 published?: CVE-2022-31803 was published on 2022-06-24 and last updated on 2026-06-17.

References

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=17141&token=17867e35cfd30c77ba0137f9a17b3a557a4b7b66&download=

Affected products (1)

cpe:2.3:a:codesys:gateway:*:*:*:*:*:*:*:*

More vulnerabilities in Codesys Gateway

CVE-2022-31802 — Critical (CVSS 9.8): In CODESYS Gateway Server V2 for versions prior to V2.3.9.38 only a part of the the specified password is been compared…
CVE-2019-9010 — Critical (CVSS 9.8): An issue was discovered in 3S-Smart CODESYS V3 products. The CODESYS Gateway does not correctly verify the ownership of…
CVE-2022-30792 — High (CVSS 7.5): In CmpChannelServer of CODESYS V3 in multiple versions an uncontrolled ressource consumption allows an unauthorized…
CVE-2022-30791 — High (CVSS 7.5): In CmpBlkDrvTcp of CODESYS V3 in multiple versions an uncontrolled ressource consumption allows an unauthorized…
CVE-2022-31805 — High (CVSS 7.5): In the CODESYS Development System multiple components in multiple versions transmit the passwords for the communication…
CVE-2022-31804 — High (CVSS 7.5): The CODESYS Gateway Server V2 does not verifiy that the size of a request is within expected limits. An unauthenticated…

All CVEs affecting Codesys Gateway →

Other CWE-400 (Uncontrolled Resource Consumption) vulnerabilities

CVE-2026-46775 — Critical (CVSS 9.9): Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0.…
CVE-2025-61303 — Critical (CVSS 9.8): Hatching Triage Sandbox Windows 10 build 2004 (2025-08-14) and Windows 10 LTSC 2021(2025-08-14) contains a…
CVE-2025-43193 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.6, macOS Sonoma 14.7.7,…
CVE-2025-24269 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4. An app may be able to…
CVE-2025-24264 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4,…
CVE-2025-24260 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4, macOS Sonoma 14.7.5,…

Browse all CWE-400 (Uncontrolled Resource Consumption) vulnerabilities →