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CVE-2026-20748— Everon api.everon.io Insufficient Session Expiration

Quick assessment

Affected
Everon api.everon.io
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Everon是Everon公司的一个电动汽车充电站系统。 Everon存在代码问题漏洞，该漏洞源于WebSocket后端使用可预测的会话标识符，可能导致会话劫持或影子攻击，进而导致拒绝服务或未经授权的身份验证。

CVSS 7.3 · High EPSS 0.25% · P16
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I. Basic Information for CVE-2026-20748

Vulnerability Information
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Vulnerability Title
Everon api.everon.io Insufficient Session Expiration
Source: CVE Program / CVE List V5
Vulnerability Description
The WebSocket backend uses charging station identifiers to uniquely associate sessions but allows multiple endpoints to connect using the same session identifier. This implementation results in predictable session identifiers and enables session hijacking or shadowing, where the most recent connection displaces the legitimate charging station and receives backend commands intended for that station. This vulnerability may allow unauthorized users to authenticate as other users or enable a malicious actor to cause a denial-of-service condition by overwhelming the backend with valid session requests.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的会话过期机制
Source: CVE Program / CVE List V5
Vulnerability Title
Everon 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Everon是Everon公司的一个电动汽车充电站系统。 Everon存在代码问题漏洞，该漏洞源于WebSocket后端使用可预测的会话标识符，可能导致会话劫持或影子攻击，进而导致拒绝服务或未经授权的身份验证。
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
Everon api.everon.io All versions -

II. Public POCs for CVE-2026-20748

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III. Intelligence Information for CVE-2026-20748

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Vendor Advisories for CVE-2026-20748 (2)

Same Patch Batch · Everon · 2026-03-06 · 4 CVEs total

CVE-2026-26288 9.4 CRITICAL Everon api.everon.io Missing Authentication for Critical Function
CVE-2026-24696 7.5 HIGH Everon api.everon.io Improper Restriction of Excessive Authentication Attempts
CVE-2026-27027 6.5 MEDIUM Everon api.everon.io Insufficiently Protected Credentials

IV. Related Vulnerabilities

Same product: api.everon.io
Same vendor: Everon
Same weakness: CWE-613

V. Comments for CVE-2026-20748

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