closedclosed 6 Nov 2020Supply chain3 Confirmed exploitationAI
Microsoft Tay Chatbot Data Poisoning Incident
Tay
Microsoft's Twitter chatbot Tay was manipulated by coordinated user inputs to generate offensive language. The bot was decommissioned within 24 hours of its launch following the incident.
- fix status
- Fix status unknown
- first report
- 23 Oct 2020
- last update
- 23 Oct 2020
Timeline · 5
Sources · 5
Advisories and databases
- 2020-10-23Microsoft BlogPost, "Learning from Tay's introduction"Microsoft Security · blogs.microsoft.com/blog/2016/03/25/learning-tays-introduction
News and write-ups
- 2020-10-23IEEE Article, "In 2016, Microsoft's Racist Chatbot Revealed the Dangers of Online Conversation"spectrum.ieee.org · spectrum.ieee.org/tech-talk/artificial-intelligence/machine-learning/in-2016-mic
Research and catalogues
- 2020-10-23Tay PoisoningMITRE ATLAS · atlas.mitre.org/studies/AML.CS0009
- 2020-10-23AIID - Incident 6: TayBotAI Incident Database · incidentdatabase.ai/cite/6
- 2020-10-23AVID - Vulnerability: AVID-2022-v013AVID · avidml.org/database/avid-2022-v013
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Supply chain
- AI role
- Attack on AI
- categories
- Data poisoning
- severity
- 3 · Confirmed exploitation
- fix status
- Fix status unknown
- targets
- Microsoft
- owasp llm top 10
- LLM04:2025 Data and Model Poisoning
- mitre atlas
- no technique for these categories
- dates
- happened 23 Mar 2016 · first reported 23 Oct 2020
- origin
- MITRE ATLASDerived from MITRE ATLAS (Apache 2.0, © MITRE).
- record
- confidence 0.95 · created 2026-10-18 06:55Z · updated 2026-10-18 06:55Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
This record as a short Markdown brief, for a ticket, a chat or a coding agent.
the brief as text
# Microsoft Tay Chatbot Data Poisoning Incident https://gcdradar.vercel.app/incidents/microsoft-tay-chatbot-data-poisoning-incident · AIR-2020-0022 · closed 2020-11-06 - Lane: Supply chain - Severity: 3 (Confirmed exploitation) - Fix status: Fix status unknown - First reported: 2020-10-23 (happened 2016-03-23) - AI role: Attack on AI - Products: Tay ## Summary Microsoft's Twitter chatbot Tay was manipulated by coordinated user inputs to generate offensive language. The bot was decommissioned within 24 hours of its launch following the incident. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2020-10-23: IEEE Article, "In 2016, Microsoft's Racist Chatbot Revealed the Dangers of Online Conversation" (https://spectrum.ieee.org/tech-talk/artificial-intelligence/machine-learning/in-2016-microsofts-racist-chatbot-revealed-the-dangers-of-online-conversation) - 2020-10-23: Microsoft BlogPost, "Learning from Tay's introduction" (https://blogs.microsoft.com/blog/2016/03/25/learning-tays-introduction) - 2020-10-23: AVID - Vulnerability: AVID-2022-v013 (https://avidml.org/database/avid-2022-v013) - 2020-10-23: AIID - Incident 6: TayBot (https://incidentdatabase.ai/cite/6) - 2020-10-23: Tay Poisoning (https://atlas.mitre.org/studies/AML.CS0009) ## Sources - 2020-10-23 MITRE ATLAS: Tay Poisoning https://atlas.mitre.org/studies/AML.CS0009 - 2020-10-23 AI Incident Database: AIID - Incident 6: TayBot https://incidentdatabase.ai/cite/6 - 2020-10-23 AVID: AVID - Vulnerability: AVID-2022-v013 https://avidml.org/database/avid-2022-v013 - 2020-10-23 Microsoft Security: Microsoft BlogPost, "Learning from Tay's introduction" https://blogs.microsoft.com/blog/2016/03/25/learning-tays-introduction - 2020-10-23 spectrum.ieee.org: IEEE Article, "In 2016, Microsoft's Racist Chatbot Revealed the Dangers of Online Conversation" https://spectrum.ieee.org/tech-talk/artificial-intelligence/machine-learning/in-2016-microsofts-racist-chatbot-revealed-the-dangers-of-online-conversation Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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