CVE-2017-3882

What it is

A vulnerability in the Universal Plug-and-Play (UPnP) implementation in the Cisco CVR100W Wireless-N VPN Router could allow an unauthenticated, Layer 2-adjacent attacker to execute arbitrary code or cause a denial of service (DoS) condition. The remote code execution could occur with root privileges. The vulnerability is due to incomplete range checks of the UPnP input data, which could result in a buffer overflow. An attacker could exploit this vulnerability by sending a malicious request to the UPnP listening port of the targeted device. An exploit could allow the attacker to cause the device to reload or potentially execute arbitrary code with root privileges. This vulnerability affects all firmware releases of the Cisco CVR100W Wireless-N VPN Router prior to Firmware Release 1.0.1.22. Cisco Bug IDs: CSCuz72642.

At a glance

Exploitability

Can be exploited from the same network segment without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

1.8% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2017-05-16 17:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:19 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.8% in the next 30 days (EPSS).
• Severity: 9.6 CRITICAL (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2017-05-16 17:29 UTC

Last modified

2026-06-17 01:19 UTC

Exploit probability

1.8% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Modified

Affected

• Cisco Small Business Rv Router Firmware 1.0.0.30
• Cisco Small Business Rv Router Firmware 1.0.1.9
• Cisco Small Business Rv Router Firmware 1.0.1.19
• Cisco Small Business Rv Router Firmware 1.0.2.6
• Cisco Small Business Rv Router Firmware 1.0.3.10
• Cisco Small Business Rv Router Firmware 1.0.4.10
• Cisco Small Business Rv Router Firmware 1.0.4.14
• Cisco Small Business Rv Router Firmware 1.0.5.4

Attack profile CVSS 3.0 · 9.6

Attack vector

Adjacent network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

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