Description

SAP Approuter does not sufficiently handle certain requests under specific conditions. An unauthenticated attacker could send specially crafted input that causes the component to crash and restart. Successful exploitation requires specific runtime conditions to be met, making the attack complex to execute. This results in a high impact on availability. There is no impact on confidentiality and integrity.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.9",
  "pubDate": "2026-08-11T01:17:21.807Z",
  "pubdate": "2026-08-11T01:17:21.807Z",
  "executiveSummary": "This vulnerability affects SAP Approuter and involves improper input handling under specific conditions, leading to a denial of service state. The primary impact is restricted entirely to system availability, resulting in application crashes and subsequent restarts, with zero impact on data confidentiality or integrity.\nThe flaw can be exploited remotely by an unauthenticated attacker capable of sending specially crafted network input to the target component. However, successful exploitation is contingent upon specific runtime conditions being met within the environment, which significantly increases the overall complexity of execution.\nFrom a risk perspective, while the vulnerability requires precise preconditions to trigger successfully, a repeatable crash condition can disrupt dependent services reliant on the SAP Approuter component. Organizations utilizing the affected software must evaluate runtime deployments and apply available security updates or operational workarounds to prevent service degradation.",
  "technicalDetails": "The vulnerability resides within the request processing logic of the SAP Approuter component. The root cause stems from the insufficient validation and parsing of specific input parameters when processed under particular runtime states. When an unauthenticated attacker transmits a malformed or specially crafted request over the network, the component fails to handle the anomalous input gracefully.\nThe attack flow proceeds as follows: First, the remote attacker identifies the presence of the SAP Approuter instance and probes for the requisite runtime conditions. Upon establishing that the environment meets the necessary parameters, the attacker formulates a payload designed to target the flawed input handling mechanism. Second, the attacker transmits the malicious request to the listening service over the network without requiring any authentication or prior privileges.\nUpon receipt, the vulnerable parsing routines process the crafted input, triggering an unhandled exception or fatal error due to the anomalous data structure. This execution anomaly forces the affected component to crash. Because the architecture typically employs automated process supervision, the component subsequently restarts, causing a temporary or repeated denial of service depending on the persistence of the malicious traffic.\nThe exploitation vector is exclusively network-based. There are no confidentiality or integrity breaches associated with this behavior, as the payload does not facilitate arbitrary code execution, memory disclosure, or unauthorized data modification. The post-exploitation impact is strictly bounded to operational downtime and service interruption caused by the crash-and-restart cycle."
}