CVE-2026-22917
Published: 15 January 2026
Summary
CVE-2026-22917 is a medium-severity Allocation of Resources Without Limits or Throttling (CWE-770) vulnerability in Sick Tdc-X401Gl Firmware. Its CVSS base score is 4.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 9.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
This control implements explicit throttling on session allocation, addressing the weakness of allocating resources without limits.
Plan testing exercises resource allocation limits and throttling during simulated failures, directly addressing weaknesses that allow unbounded resource use.
Contingency plan updates ensure recovery strategies address unbounded resource allocation, making it harder for attackers to exploit lack of throttling to cause prolonged outages.
Provides continuity when unbounded resource allocation at the primary site leads to exhaustion and downtime.
Alternate services allow operations to continue when primary allocation of resources lacks limits or throttling.
Explicit planning of security-related actions requires defining limits, windows, and resource allocations, making allocation without throttling far less likely.
Measures of performance include tracking allocation behavior and throttling effectiveness, reducing the window for resource exhaustion attacks.
Imposes an inactivity-based limit on network resource allocation, throttling the number of concurrently held connections.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE enables resource exhaustion DoS via network-exploitable input handling flaw (CWE-770), directly mapping to application/system exploitation for endpoint availability impact.
NVD Description
Improper input handling in a system endpoint may allow attackers to overload resources, causing a denial of service.
Deeper analysisAI
CVE-2026-22917 is a vulnerability involving improper input handling in a system endpoint, which may allow attackers to overload resources and cause a denial of service. Published on 2026-01-15, it has a CVSS v3.1 base score of 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) and is associated with CWE-770 (Allocation of Resources Without Limits or Throttling). The issue affects products from SICK, as indicated by advisories on their PSIRT page and related CSAF documents.
An attacker with low privileges (PR:L) can exploit this vulnerability over the network (AV:N) with low complexity (AC:L) and no user interaction required (UI:N). Successful exploitation results in low-impact availability disruption (A:L) with no confidentiality or integrity effects (C:N/I:N) and no scope change (S:U), such as partial resource exhaustion leading to degraded service on the affected endpoint.
Mitigation details are provided in SICK's advisories, including the PSIRT page at https://sick.com/psirt and CSAF documents at https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0001.json and https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0001.pdf. Additional ICS security practices are referenced via CISA at https://www.cisa.gov/resources-tools/resources/ics-recommended-practices, and the CVSS calculator is available at https://www.first.org/cvss/calculator/3.1.
Details
- CWE(s)