CVE-2025-26210

Exp

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.

Published: 2025-09-03 Last update: 2025-09-26 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-26210 is rated High Exploit Risk (64.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.54%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2025-26210

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-26210

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.17% 0.54% +0.37%
2 2026-05-20 0.05% 0.17% +0.12%
3 2025-10-05 — 0.05% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-26210

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-26210

Affected software / configurations for CVE-2025-26210

Vendor Product Version Raw CPE
deepseek deepseek-r1 1.0 cpe:2.3:a:deepseek:deepseek-r1:1.0:*:*:*:*:*:*:*
deepseek deepseek-v2 — cpe:2.3:a:deepseek:deepseek-v2:-:*:*:*:*:*:*:*
deepseek deepseek-v3 1.0 cpe:2.3:a:deepseek:deepseek-v3:1.0:*:*:*:*:*:*:*

References for CVE-2025-26210

URL Tags
https://deepseek.com Permissions Required
https://hackmd.io/@MrqrFIlhQFi7vUwkqbrXDw/deepseek Exploit Third Party Advisory
https://youtu.be/IgQwy52FVT4 Exploit
cvelogic Threat Intelligence