# anthropics vulnerabilities & exploitation

> As of 2026-10-10, Threadlinqs tracks 5 anthropics CVEs, 0 in the CISA Known Exploited Vulnerabilities catalog, linked to 4 tracked threat campaigns.

**Data as of:** 2026-10-10

## Exploitation timeline

Threadlinqs has recorded 5 anthropics CVEs published between 2025-10-15 and 2026-07-15. The busiest month was 2026-07 (2 new CVEs). None of them is listed in CISA KEV yet.

## Most exploited vulnerabilities

Ranked with CISA KEV listings first, then EPSS exploit probability, then CVSS score. Showing 5 of 5 tracked anthropics CVEs.

- [CVE-2026-47751](https://intel.threadlinqs.com/cve/CVE-2026-47751) — MEDIUM 5.3 · EPSS 0.8% · 2026-07-16
- [CVE-2026-55407](https://intel.threadlinqs.com/cve/CVE-2026-55407) — MEDIUM 6.3 · EPSS 0.8% · 2026-07-16
- [CVE-2025-66032](https://intel.threadlinqs.com/cve/CVE-2025-66032) — HIGH 8.7 · EPSS 0.7% · 2025-12-03
- [CVE-2026-25724](https://intel.threadlinqs.com/cve/CVE-2026-25724) — HIGH 7.5 · EPSS 0.7% · 2026-02-06
- [CVE-2025-59829](https://intel.threadlinqs.com/cve/CVE-2025-59829) — LOW 2.3 · EPSS 0.4% · 2025-10-03

## Products affected

Threadlinqs normalises CPE and CNA product records across all 5 CVEs; 3 distinct anthropics products are affected. The most frequently affected:

- claude-code — 3 CVEs
- buffa — 1 CVE
- claude-code-action — 1 CVE

## Threat activity

4 tracked threat campaigns reference anthropics products or exploit anthropics CVEs:

- [Claude Code RCE via Malicious .mcp.json in Pull Request Branches](https://intel.threadlinqs.com/threat/TL-2026-1929) — HIGH — 2026-08-07
- [Claude Code Symlink Flaw in Startup Memory Loader Enables Silent File Exfiltration via CLAUDE.md Imports](https://intel.threadlinqs.com/threat/TL-2026-1718) — MEDIUM — 2026-07-27
- [CVE-2026-55407: Unbounded Heap Allocation DoS in Anthropic's Buffa Rust Protobuf Library (decode_unknown_field)](https://intel.threadlinqs.com/threat/TL-2026-1039) — MODERATE — 2026-07-01
- [Fake Bug Report Prompt Injection Attacks Hijacking AI Coding Agents (Agentjacking)](https://intel.threadlinqs.com/threat/TL-2026-1012) — CRITICAL — 2026-06-30

## How to prioritise anthropics patching

This order follows the data Threadlinqs holds for anthropics, not a generic severity checklist:

- No anthropics CVE is in CISA KEV yet, so rank by exploit probability instead.
- Outside KEV, the highest EPSS scores are [CVE-2026-47751](https://intel.threadlinqs.com/cve/CVE-2026-47751) (0.8%), [CVE-2026-55407](https://intel.threadlinqs.com/cve/CVE-2026-55407) (0.8%), [CVE-2025-66032](https://intel.threadlinqs.com/cve/CVE-2025-66032) (0.7%).
- 0 CVEs score Critical and 2 High on CVSS v3 (maximum 8.7, average 6); sequence these after KEV and high-EPSS items.

## About this data

Vendor attribution comes from the CNA and CPE product records of each CVE, folded to one vendor name; CVSS, EPSS and KEV status are read from the Threadlinqs CVE catalog; campaign and actor links come from tracked threat records. Counts reflect the data as of 2026-10-10 and refresh daily.

Canonical: https://intel.threadlinqs.com/vendors/anthropics
All vendors: https://intel.threadlinqs.com/vendors
Full detection coverage and IOCs via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp