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CVE-2021-20677

Quick assessment

Affected
NEC Platforms, Ltd. UNIVERGE Aspire series PBX
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.

NEC UNIVERGE Aspire UX是日本 （NEC）公司的一个应用系统。提供一个可以灵活地支持扩展得系统。 NEC UNIVERGE Aspire UX 存在安全漏洞，该漏洞允许远程攻击者执行拒绝服务(DoS)攻击。

AI Predicted 6.5 Difficulty: Easy EPSS 0.95% · P61

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-20677

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
UNIVERGE Aspire series PBX (UNIVERGE Aspire WX from 1.00 to 3.51, UNIVERGE Aspire UX from 1.00 to 9.70, UNIVERGE SV9100 from 1.00 to 10.70, and SL2100 from 1.00 to 3.00) allows a remote authenticated attacker to cause system down and a denial of service (DoS) condition by sending a specially crafted command.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
NEC UNIVERGE Aspire UX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NEC UNIVERGE Aspire UX是日本 （NEC）公司的一个应用系统。提供一个可以灵活地支持扩展得系统。 NEC UNIVERGE Aspire UX 存在安全漏洞，该漏洞允许远程攻击者执行拒绝服务(DoS)攻击。
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
NEC Platforms, Ltd. UNIVERGE Aspire series PBX UNIVERGE Aspire WX from 1.00 to 3.51, UNIVERGE Aspire UX from 1.00 to 9.70, UNIVERGE SV9100 from 1.00 to 10.70, and SL2100 from 1.00 to 3.00 -

II. Public POCs for CVE-2021-20677

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-20677

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Vendor Advisories for CVE-2021-20677 (1)

Other References for CVE-2021-20677 (1)

IV. Related Vulnerabilities

Same vendor: NEC Platforms, Ltd.

V. Comments for CVE-2021-20677

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