CVE-2018-15439

Summary

A vulnerability in the Cisco Small Business Switches software allows an unauthenticated, remote attacker to bypass user authentication and execute commands with full admin rights.

Shortened by a language model. Every number, version and name in it is checked against the description below, and it is only shown when it is clearly shorter.

Description

A vulnerability in the Cisco Small Business Switches software could allow an unauthenticated, remote attacker to bypass the user authentication mechanism of an affected device. The vulnerability exists because under specific circumstances, the affected software enables a privileged user account without notifying administrators of the system. An attacker could exploit this vulnerability by using this account to log in to an affected device and execute commands with full admin rights. Cisco has not released software updates that address this vulnerability. This advisory will be updated with fixed software information once fixed software becomes available. There is a workaround to address this vulnerability.

At a glance

Exploitability

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

Exploit odds

49.7% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

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

Timeline

1. 2018-08-17 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2018-11-08 17:29 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-06-17 01:42 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 49.7% in the next 30 days (EPSS).
• Severity: 9.8 CRITICAL (CVSS).
• Fix: a patch or advisory is linked.
• It meets the bar for Drop everything: critical, and exploited or very likely to be.

Details

Published

2018-11-08 17:29 UTC

Last modified

2026-06-17 01:42 UTC

Exploit probability

49.7% · EPSS, next 30 days

Weakness

CWE-798 · Hard-coded credentials

Record status

Modified

Affected

• Cisco sg200-50 Firmware
• Cisco sg200-50p Firmware
• Cisco sg200-50fp Firmware
• Cisco sg200-26 Firmware
• Cisco sg200-26p Firmware
• Cisco sg200-26fp Firmware
• Cisco sg200-18 Firmware
• Cisco sg200-10fp Firmware

Attack profile CVSS 3.1 · 9.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2018-15439.md and follow it. Check whether this project is affected by CVE-2018-15439. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge