CVE-2019-1912

Cisco Small Business 220 Series Smart Switches Authentication Bypass Vulnerability

CRITICAL
9.1
CVSS Score
Published: August 7, 2019 at 05:45 AM UTC
Updated: June 17, 2026 at 02:29 AM UTC
23 products affected across 1 vendorSf220-48p FirmwareSg220-26p FirmwareSg220-28mp Firmware

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Severity
CRITICAL9.1
Exploit prediction
EPSS 17%
SSVC
No known exploit

Description

A vulnerability in the web management interface of Cisco Small Business 220 Series Smart Switches could allow an unauthenticated, remote attacker to upload arbitrary files. The vulnerability is due to incomplete authorization checks in the web management interface. An attacker could exploit this vulnerability by sending a malicious request to certain parts of the web management interface. Depending on the configuration of the affected switch, the malicious request must be sent via HTTP or HTTPS. A successful exploit could allow the attacker to modify the configuration of an affected device or to inject a reverse shell. This vulnerability affects Cisco Small Business 220 Series Smart Switches running firmware versions prior to 1.1.4.4 with the web management interface enabled. The web management interface is enabled via both HTTP and HTTPS by default.

Affected

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

v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sf-220-24 (same device)
v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sf220-24p (same device)
v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sf220-48 (same device)
v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sf220-48p (same device)
v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sg220-26 (same device)
v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sg220-26p (same device)
v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sg220-28 (same device)
v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sg220-28mp (same device)
v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sg220-50 (same device)
v < 1.1.4.4
Affected range stops below 1.1.4.4, so it looks safe — our inference, not a vendor statement
cisco-sg220-50p (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 exploitAutomatablePartial 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
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-285CWE-863

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