CVE-2018-15439

Cisco Small Business Switches Privileged Access Vulnerability

CRITICAL
9.8
CVSS Score
Published: November 8, 2018 at 05:00 PM UTC
Updated: June 17, 2026 at 01:42 AM UTC
229 products affected across 1 vendorSg300-10pp FirmwareSg300-28mp FirmwareSf300-48pp Firmware

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Severity
CRITICAL9.8
Exploit prediction
EPSS 50%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
cisco-sf200-24 (same device)
All versions
cisco-sf200-24fp (same device)
All versions
cisco-sf200-24p (same device)
All versions
cisco-sf200-48 (same device)
All versions
cisco-sf200-48p (same device)
All versions
cisco-sf250-24 (same device)
All versions
cisco-sf250-24p (same device)
All versions
cisco-sf250-48 (same device)
All versions
cisco-sf250-48hp (same device)
All versions
cisco-sf300-08 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-798

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