Description

Out-of-bounds read in Remote Desktop Client allows an unauthorized attacker to disclose information over a network.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-08-19T22:17:09.530Z",
  "pubdate": "2026-08-19T22:17:09.530Z",
  "executiveSummary": "An out-of-bound read vulnerability exists within the Remote Desktop Client, which can be exploited by an unauthorized remote attacker to achieve information disclosure across a network.\nThe vulnerability affects the Remote Desktop Client product line, exposing sensitive memory contents from the host or client application depending on the specific architectural parsing context.\nSuccessful exploitation allows an unauthenticated adversary to bypass confidentiality boundaries, potentially harvesting sensitive data structures, credentials, or application memory artifacts exposed during network communications.\nThe risk implication is moderate to high, contingent upon the exact nature of the memory contents leaked and whether the disclosed data facilitates subsequent exploitation chains.\nAttack capabilities require network connectivity to the target or the ability to intercept/spoof remote desktop traffic, exploiting improper bounds validation within the protocol or data parsing routines.\nNo complex user interaction or elevated privileges are strictly mandated if the client processes malicious inputs or responses supplied via an untrusted remote desktop connection.",
  "technicalDetails": "The vulnerability stems from an out-of-bounds read flaw localized within the packet parsing or rendering engine of the Remote Desktop Client.\nThe root cause is attributable to insufficient boundary checks and inadequate input validation when processing incoming data frames, packets, or structures over the network protocol.\nWhen the affected component evaluates variable-length fields or structural offsets supplied by a remote entity, it fails to properly verify that the specified length matches the actual allocated buffer size.\nThe vulnerable component handles data serialization and deserialization routines responsible for interpreting remote desktop display updates, session configurations, or protocol handshakes.\nDuring exploitation, an attacker leverages network exposure to transmit a maliciously crafted packet or sequence of data streams designed to trigger the flawed parsing logic.\nAs the application attempts to read beyond the legitimate boundaries of the allocated heap or stack buffer, it extracts adjacent memory contents instead of dropping the malformed input.\nThe extracted out-of-bounds data is subsequently mirrored, echoed, or inadvertently processed in a manner that allows the attacker to retrieve the leaked bytes through application responses or observable side channels.\nPost-exploitation impact is characterized primarily by unauthorized information disclosure, wherein the adversary gains visibility into volatile memory structures, potentially exposing cryptographic keys, internal session identifiers, or previously processed user data.\nAuthentication requirements are nonexistent for network-based injection where the client connects to a malicious server, or minimal if the attack relies on man-in-the-middle positioning.\nPrivilege requirements are low, as the client application typically runs under standard user contexts, yet the memory exposure encompasses data accessible within the application execution space."
}