CVE-2019-1766

Cisco IP Phone 8800 Series File Upload Denial of Service Vulnerability

HIGH
7.5
CVSS Score
Published: March 22, 2019 at 08:05 PM UTC
Updated: June 17, 2026 at 02:29 AM UTC
3 products affected across 1 vendorIP Phone 8800 FirmwareIp Phone 8800IP Phone 8800 Series

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an unauthenticated, remote attacker to cause high disk utilization, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software does not restrict the maximum size of certain files that can be written to disk. An attacker who has valid administrator credentials for an affected system could exploit this vulnerability by sending a crafted, remote connection request to an affected system. A successful exploit could allow the attacker to write a file that consumes most of the available disk space on the system, causing application functions to operate abnormally and leading to a DoS condition. This vulnerability affects Cisco IP Phone 8800 Series products running a SIP Software release prior to 12.5(1)SR1.

Affected

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

v < 12.5(1)sr1
Affected range stops below 12.5(1)sr1, so it looks safe — our inference, not a vendor statement
cisco-ip-phone-8800 (same device)
v < 12.5(1)SR1
Affected range stops below 12.5(1)SR1, so it looks safe — our inference, not a vendor statement
All versions

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
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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