Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessReach Chromoting network endpoint
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DeliverySend crafted remoting traffic
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ExploitBypass missing authorization check
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ExecutionRead unauthorized sensitive data
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ImpactExfiltrate disclosed information
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Requires that the Chrome Remote Desktop (Chromoting) functionality is in use on the target Windows host running Chrome prior to 155.0.8059.39, and that the attacker can send crafted network traffic to the remoting endpoint. The CVSS AC:H rating means exploitation is gated by conditions the attacker cannot fully control - plausibly an active or establishing remoting session, specific protocol state, or timing - which limits reliability. No authentication is required (PR:N) and no user interaction is needed (UI:N), but the dependence on the Chromoting feature being active is the key limiting factor; hosts not using Chrome Remote Desktop are not exposed. |
| Impact | This is a genuinely moderate-priority issue rather than a false alarm, and the signals are internally consistent. The CVSS 3.1 vector (AV:N/AC:H/PR:N/UI:N) describes a network-reachable, unauthenticated flaw, but the High attack complexity (AC:H) indicates exploitation depends on conditions outside the attacker's control (e.g. an active Chrome Remote Desktop/Chromoting session and specific timing or state), which materially lowers real-world likelihood. Impact is confidentiality-only (C:H/I:N/A:N) - information disclosure, not code execution - consistent with Chromium's self-assigned Medium severity and the 5.9 base score. No EPSS score was supplied, so exploitation probability cannot be quantified; this gap should be noted explicitly. The CVE is NOT in CISA KEV and no public POC is referenced, so there is no public exploit identified at time of analysis. No SSVC decision data was provided. Net: patch in normal cadence - the AC:H condition and confidentiality-only impact make this lower urgency than the network/unauthenticated vector alone would suggest. |
| Exploit ScenarioDerived | An attacker positioned on the network path to a host running Chrome Remote Desktop (Chromoting) sends crafted network traffic to the remoting endpoint, exploiting a missing authorization check to read data it should not have access to. Because attack complexity is High, the attacker must satisfy conditions such as an active remoting session or precise timing, and the payoff is disclosure of sensitive information rather than control of the host. No public exploit code is identified at time of analysis. |
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Alert meAnalysisAIv1 – Oct 06, 2026
Missing authorization in the Chromoting (Chrome Remote Desktop) component of Google Chrome on Windows prior to 155.0.8059.39 lets a remote, unauthenticated attacker obtain sensitive information by sending crafted network traffic to a remoting endpoint. The flaw carries a CVSS 3.1 base score of 5.9 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N), meaning no credentials or user interaction are needed but successful exploitation is gated by conditions the attacker cannot fully control; there is no public exploit identified at time of analysis. Exposure is limited to hosts that actually have the Chromoting/Chrome Remote Desktop functionality in use, and Google has shipped a fixed build rated Medium severity.
RemediationAI
Vendor-released patch: upgrade Google Chrome on Windows to 155.0.8059.39 or later via the Stable Channel update described at https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html, and note that Chrome's auto-update mechanism should apply it, so verify the installed version from chrome://version. Until that build is deployed, the most direct compensating control is to disable or remove the Chrome Remote Desktop / Chromoting host component on affected machines (or stop the Chromoting host service), which removes the vulnerable endpoint entirely at the cost of losing remote access and support capability to that host. Alternatively, restrict network reachability to the remoting endpoint - keep the host off untrusted networks, block inbound connections to the remoting service (typically TCP 443) and limit outbound remoting traffic via egress policy - which reduces exposure but does not eliminate the flaw and may break legitimate remote sessions or NAT traversal. Because opportunistic exploitation is possible without credentials or user interaction, prioritize patching hosts that must retain remote desktop functionality; there is no report of active exploitation, so emergency removal of Chrome is not warranted. The upstream issue at https://issues.chromium.org/issues/553154579 can be tracked for additional detail once the restriction on technical information is lifted.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The affected technology is Chromoting, the remoting protocol and host stack behind Chrome Remote Desktop, which brokers screen capture, input, and session data between a host machine and remote clients over Google's infrastructure and network connections. The root cause is CWE-862 (Missing Authorization): a remoting code path fails to enforce an authorization check before returning data, so a party that can reach the endpoint and craft the right traffic can read information it should not be entitled to. The CVSS vector's PR:N/UI:N indicates no authentication or user interaction is required, while AC:H reflects that the attacker must satisfy preconditions they do not fully control - most plausibly an active or establishing remoting session, a specific protocol state, or timing - which keeps reliability low. Impact is confined to confidentiality (C:H) with no integrity or availability effect, consistent with an information-disclosure-only defect rather than code execution or denial of service. Per the supplied CPE (cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*) and EUVD entry (EUVD-2026-93577), only the Chrome build prior to 155.0.8059.39 on Windows is in scope.
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Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Crafted network traffic gives AV:N; dependence on an active Chromoting session/timing gives AC:H; no auth (PR:N/UI:N); missing-authorization info disclosure yields C:H with I:N/A:N.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
Lifecycle Timeline
4DescriptionCVE.org
Missing authorization in Chromoting in Google Chrome on on Windows prior to 155.0.8059.39 allowed a remote attacker to obtain sensitive information via crafted network traffic. (Chromium security severity: Medium)
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
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EUVD-2026-93577
GHSA-qjgr-ch5f-854r
NVD
CVE.org
EPSS
Vulnrichment
VulDB
Exploit-DB