EUVD-2026-66660
GHSA-wq69-v2pv-fr6p
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Local delivery of crafted serialized data that the victim must open (AV:L/UI:R); impact is a client crash only, so A:L with no confidentiality or integrity impact.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
An issue in TokTok qTox v1.18.4 allows a local attacker to cause a denial of service via the src/persistence/serialize.cpp component
AnalysisAI
Denial of service in qTox v1.18.4 lets an attacker crash the client through the profile-serialization code in src/persistence/serialize.cpp, classified as uncontrolled resource consumption (CWE-400). The description scopes this to a local attacker requiring victim interaction, and SSVC records a proof-of-concept, so publicly available exploit code exists; it is not listed in CISA KEV and EPSS is low (0.13%, 3rd percentile), indicating no evidence of widespread exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation targets the profile/state deserialization path in qTox 1.18.4's src/persistence/serialize.cpp and requires the victim to load attacker-crafted serialized data - the CVSS vector's UI:R confirms user interaction is required, which is the primary limiting factor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals conflict and should be reconciled before prioritizing. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch identified at time of analysis: the only upstream reference is the bug report at https://github.com/TokTok/qTox/issues/706, which is an issue rather than a tagged release or merged fix, and no fixed version is provided in the data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: issue a communication to all qTox users warning against opening untrusted profile files and attachments; document qTox v1.18.4 deployment scope across the organization. …
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Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
View allVendor StatusVendor
SUSE
Severity: CriticalShare
External POC / Exploit Code
Leaving vuln.today