Gpt-5.3 Codex — Cyber Threats, Attacks & Incidents

Threat entity extracted from intelligence sources

Frequency
3
occurrences
First Seen
July 28, 2026
Last Seen
July 29, 2026

Gpt-5.3 Codex is a technology platform tracked by ThreatCluster, appearing in 2 threat clusters built from 3 intelligence report mentions.

Gpt-5.3 Codex is a technology platform tracked across 2 threat clusters and 3 intelligence report mentions on ThreatCluster. First observed July 28, 2026; most recent activity July 29, 2026.

Related Threat Clusters

Recent Intelligence Reports

  • Microsoft introduces its own AI model for cybersecurity — Heise.De · July 29, 2026
  • Microsoft has unveiled Project Perception — Mezha.Ua · July 28, 2026
  • Microsoft's new cyber model handles most MDASH work, but its top score still uses GPT — Mlq.Ai · July 28, 2026

Frequently asked questions

What is Gpt-5.3 Codex?

Gpt-5.3 Codex is a technology platform tracked by ThreatCluster, appearing in 2 threat clusters built from 3 intelligence report mentions.

Is Gpt-5.3 Codex still active?

The most recent intelligence report mentioning Gpt-5.3 Codex on ThreatCluster is dated July 29, 2026. Activity was first observed July 28, 2026, giving a tracked span from then to July 29, 2026.

What is Gpt-5.3 Codex associated with?

Across ThreatCluster reporting, Gpt-5.3 Codex most frequently co-occurs with Azure AI Foundry, ExploitGym, Gpt-5.4 Mini, MAI-Code-1-Flash, MAI-Cyber-1-Flash, among 12 tracked related entities.

What are the latest developments involving Gpt-5.3 Codex?

The most significant recent cluster is “Microsoft Unveils Project Perception to Combat AI-Powered Cyber Threats” (9 articles · Updated July 28, 2026). Gpt-5.3 Codex appears across 2 threat clusters in total, listed above with sources.

How much reporting does ThreatCluster have on Gpt-5.3 Codex?

Gpt-5.3 Codex appears in 3 intelligence report mentions across 2 deduplicated threat clusters, aggregated from 17,000+ monitored sources.

CVSS v3.1 Breakdown