Is this vulnerability remotely exploitable?

Yes, if an attacker can cause the service to decode GGUF content over a network-exposed interface or via workflows that automatically load remote or user-supplied GGUF data.

What level of access does an attacker need?

The attacker needs the ability to influence or provide the GGUF data processed by Ollama. In some deployments this may be possible without authentication if untrusted GGUF inputs are accepted or auto-fetched.

What is the safest general fix pattern?

The most robust fix pattern is to add strict input validation for GGUF structures and enforce conservative upper bounds on all resource-driven fields, combined with timeouts and memory limits around decoding so that malicious inputs cannot exhaust resources.

Severity:

HIGH RISK

(7.5)

Input Validation & Uncontrolled Resource Consumption (CWE-20, CWE-400) in Ollama GGUF Decoder

CVE-2025-66959

Published:

Jan 21, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Denial of Service via Malformed Input

CWE:

CWE-20;CWE-400

Impact:

Denial of Service (Service Crash or Resource Exhaustion)

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Denial of Service via Malformed Input

CWE:

CWE-20;CWE-400

Impact:

Denial of Service (Service Crash or Resource Exhaustion)

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Input Validation & Uncontrolled Resource Consumption (CWE-20, CWE-400) in Ollama GGUF Decoder

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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