How severe is CVE-2023-27334?

CVE-2023-27334 has a CVSS 3.x base score of 7.5, rated high 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 high.

Is CVE-2023-27334 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27334?

CVE-2023-27334 primarily affects Softing Edgeaggregator. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-27334?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-27334 have an EU (EUVD) identifier?

Yes. CVE-2023-27334 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-31110.

When was CVE-2023-27334 published?

CVE-2023-27334 was published on 2024-05-03 and last updated on 2026-06-17.

CVE-2023-27334

CVE-2023-27334 is a high-severity vulnerability in Softing Edgeaggregator with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-31110
Weakness: CWE-400
Affected product: Softing Edgeaggregator
Published: 2024-05-03
Last modified: 2026-06-17

Description

Softing edgeConnector Siemens ConditionRefresh Resource Exhaustion Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Softing edgeConnector Siemens. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of OPC UA ConditionRefresh requests. By sending a large number of requests, an attacker can consume all available resources on the server. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20498.

Frequently asked questions

What is CVE-2023-27334?: Softing edgeConnector Siemens ConditionRefresh Resource Exhaustion Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Softing edgeConnector Siemens. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of OPC UA ConditionRefresh requests. By sending a large number of requests, an attacker can consume all available resources on the server. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20498.
How severe is CVE-2023-27334?: CVE-2023-27334 has a CVSS 3.x base score of 7.5, rated high 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 high.
Is CVE-2023-27334 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27334?: CVE-2023-27334 primarily affects Softing Edgeaggregator. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-27334?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-27334 have an EU (EUVD) identifier?: Yes. CVE-2023-27334 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-31110.
When was CVE-2023-27334 published?: CVE-2023-27334 was published on 2024-05-03 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:softing:edgeaggregator:*:*:*:*:*:*:*:*
cpe:2.3:a:softing:edgeconnector:*:*:*:*:*:*:*:*
cpe:2.3:a:softing:opc_ua_c\+\+_software_development_kit:*:*:*:*:*:*:*:*
cpe:2.3:a:softing:secure_integration_server:*:*:*:*:*:*:*:*

More vulnerabilities in Softing Edgeaggregator

CVE-2022-2336 — Critical (CVSS 9.8): Softing Secure Integration Server, edgeConnector, and edgeAggregator software ships with the default administrator…
CVE-2023-27335 — Critical (CVSS 9.6): Softing edgeAggregator Client Cross-Site Scripting Remote Code Execution Vulnerability. This vulnerability allows…
CVE-2023-38125 — High (CVSS 8.8): Softing edgeAggregator Permissive Cross-domain Policy with Untrusted Domains Remote Code Execution Vulnerability. This…
CVE-2024-0860 — High (CVSS 8.0): The affected product is vulnerable to a cleartext transmission of sensitive information vulnerability, which may allow…
CVE-2023-27336 — High (CVSS 7.5): Softing edgeConnector Siemens OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This…
CVE-2022-37453 — High (CVSS 7.5): An issue was discovered in Softing OPC UA C++ SDK before 6.10. A buffer overflow or an excess allocation happens due to…

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