CVE-2025-26210
8.8 · HIGHOverview
CVE-2025-26210 is a high-severity vulnerability affecting deepseek deepseek-r1. It was published on September 3, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
DeepSeek R1 through V3.1 allows XSS, as demonstrated by JavaScript execution in the context of the run-html-chat.deepseeksvc.com domain. NOTE: some third parties have indicated that this is intended behavior.
Remediation
Check the references section for vendor advisories and patches from deepseek. Update deepseek-r1 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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Frequently Asked Questions
What is CVE-2025-26210?
CVE-2025-26210 is a high-severity vulnerability affecting deepseek deepseek-r1. It was published on September 3, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2025-26210?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-26210?
Check the references section for vendor advisories and patches from deepseek. Update deepseek-r1 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-26210?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-26210 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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