{"data":{"id":"1e2d9ff3-7994-4db2-9d2f-f39825447382","title":"Toward Polymorphic Backdoor Against Semantic Communication via Intensity-Based Poisoning","summary":"Researchers propose SemBugger, a polymorphic backdoor against Semantic Communication (SC) systems. Unlike earlier monomorphic SC backdoors with a single attack target, it adjusts trigger intensity to produce diverse malicious outputs through a multi-effect poisoning-training framework, while keeping transmission fidelity for benign samples. Experiments on diverse SC models and benchmark datasets report high attack efficacy and a defense that neutralizes the attacks.","solution":"The paper proposes a provable robustness defense that adds controlled noise to SC inputs to resist SemBugger's homogeneous attacks, with a theoretical lower bound on defense efficacy.","labels":["security","research"],"sourceUrl":"http://ieeexplore.ieee.org/document/11501285","publishedAt":"2026-04-30T13:18:58.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":["other"],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":[],"affectedVendorsRaw":[],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":null,"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":null,"disclosureDate":"2026-04-30T13:18:58.000Z","fixReleasedAt":null,"daysToFix":null,"fixCheckedAt":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"advanced","impactType":["integrity","safety"],"aiComponentTargeted":"model","llmSpecific":false,"classifierConfidence":0.9,"researchCategory":"peer_reviewed","atlasIds":null}}