What is the CVSS score of CVE-2019-25327?

CVE-2019-25327 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a public PoC exploit available for CVE-2019-25327?

Yes, a public proof-of-concept exploit is available for CVE-2019-25327. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2019-25327?

Within 24 hours: Inventory all systems running Prime95 v29.8 build 6 and isolate affected machines from production networks if feasible. Within 7 days: Disable Prime95 or restrict network access to affected systems using firewall rules, prohibit external connections to port 3110, and enforce input validation controls. Within 30 days: Plan upgrade to Prime95 v30.x or later versions once patches are released, and conduct forensic review for indicators of compromise on all affected systems.

DNS CVE-2019-25327

CRITICAL

Heap-based Buffer Overflow (CWE-122)

2026-02-12 disclosure@vulncheck.com

Buffer Overflow DNS

9.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-122 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Heap buffer bounds checking MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 9.8.
Exploit ScenarioDerived	Crafted user ID overflows buffer.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Buffer overflow in Prime95 29.8 build 6 user ID field allows code execution. PoC available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:02 CVSS 9.8

Buffer overflow in Prime95 user ID input.

RemediationAI

Update Prime95.

Affected ProductsAI

Prime95 29.8 build 6

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-122 heap overflow.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Feb 13, 2026 - 14:23 vuln.today

Public exploit code

CVE Published

Feb 12, 2026 - 23:16 nvd

CRITICAL 9.8

DescriptionCVE.org

Prime95 version 29.8 build 6 contains a buffer overflow vulnerability in the user ID input field that allows remote attackers to execute arbitrary code. Attackers can craft a malicious payload and paste it into the PrimeNet user ID and proxy host fields to trigger a bind shell on port 3110.

Executive ViewAI

Why It Matters

CVE-2019-25327 is a critical remote code execution vulnerability affecting Prime95 v29.8 build 6 that allows attackers to execute arbitrary commands by exploiting buffer overflow in user input fields. Organizations using this software face immediate risk of system compromise and unauthorized access, with no vendor patch currently available to remediate the threat.

Business Impact: Severe

Compensating Controls

Implement strict network segmentation to restrict outbound connections from Prime95 systems; block port 3110 at the firewall; disable or uninstall Prime95 if not mission-critical; monitor network traffic for suspicious bind shells; enforce strict input validation on PrimeNet user ID and proxy host fields; restrict Prime95 execution to non-privileged user accounts; consider upgrading to a patched version when available from vendor.

Threat Intelligence Overview

EPSS Score

0.2%

Top 54% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

Exploit-DB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC Yes

EPSS 0.2%

Patch available No

Active threat No

Deciding rule

CRITICAL severity + public POC available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +49

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.