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CVE-2026-48021— epa4all Security Incident: Implement keystore based on Telematik TSL, implement hostname check and certificate check for lib-vau

Quick assessment

Affected
med-united epa4all
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

med-united epa4all是med-united组织的一款服务器设备与网络产品。 med-united epa4all 2026-05-20之前版本存在加密问题漏洞，该漏洞源于TLS连接被拦截后，攻击者完成VAU握手并使用攻击者控制的密钥获取会话加密密钥，导致内部HTTP流量可读可修改，且攻击者可通过劫持的通道注入任意请求。

CVSS 9.1 · Critical EPSS 0.19% · P8

Affected Version Matrix 1

VendorProduct Version RangeStatus
med-united epa4all < 2026-05-20 affected
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I. Basic Information for CVE-2026-48021

Vulnerability Information
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Vulnerability Title
epa4all Security Incident: Implement keystore based on Telematik TSL, implement hostname check and certificate check for lib-vau
Source: CVE Program / CVE List V5
Vulnerability Description
In epa4all, prior to version 2026-05-20, an attacker who can intercept the TLS connection between epa4all and the ePA backend can complete the VAU handshake with attacker-controlled keys and obtain the session encryption keys. All inner HTTP traffic (patient consent decisions, medication data, document operations, authorization tokens, and entitlement queries) becomes readable and modifiable. The attacker can also inject arbitrary requests through the hijacked channel. This issue has been patched in version 2026-05-20.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
med-united epa4all 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
med-united epa4all是med-united组织的一款服务器设备与网络产品。 med-united epa4all 2026-05-20之前版本存在加密问题漏洞，该漏洞源于TLS连接被拦截后，攻击者完成VAU握手并使用攻击者控制的密钥获取会话加密密钥，导致内部HTTP流量可读可修改，且攻击者可通过劫持的通道注入任意请求。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
med-united epa4all < 2026-05-20 -

II. Public POCs for CVE-2026-48021

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9663 chars
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III. Intelligence Information for CVE-2026-48021

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Vendor Advisories for CVE-2026-48021 (2)

Other References for CVE-2026-48021 (1)

IV. Related Vulnerabilities

Same product: epa4all
Same vendor: med-united
Same weakness: CWE-295

V. Comments for CVE-2026-48021

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