What is the CVSS score of CVE-2025-10547?

CVE-2025-10547 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: 0.1%.

How to fix or mitigate CVE-2025-10547?

Within 24 hours: Identify all Vigor Router models and firmware versions in your environment using network discovery tools. Within 7 days: Contact DrayTek support or check their advisory portal for the specific patch version addressing CVE-2025-10547 and test in a controlled environment. Within 30 days: Apply vendor-released patch to all affected Vigor Router devices and verify successful deployment through firmware version confirmation.

CVE-2025-10547

EUVD-2025-32500 CRITICAL

2025-10-03 cret@cert.org

Buffer Overflow

9.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Impact	CVSS 9.8.
Exploit ScenarioDerived	Exploit uninitialized variable for code execution.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 13, 2026

Uninitialized variable in Vigor Routers DrayOS HTTP CGI. EPSS 0.06%.

Earlier versions of this analysis (1)

v1 Mar 13, 2026 - 19:29 CVSS 9.8

Uninitialized variable in Vigor router.

RemediationAI

Update firmware.

Affected VersionsENISA

Vigor2962 0 <4.4.5.1

Vigor2135 4.5.1

Vigor2926 3.9.9.12

Vigor2927L-5G 4.5.1

Vigor1000B 4.4.5.1

Vigor2915 0 <4.4.6.1

Vigor3912 4.4.5.1

Vigor2766 0 <4.5.1

Vigor3912 0 <4.4.5.1

Vigor1000B 0 <4.4.5.1

Vigor2862 LTE 3.9.9.12

Vigor2135 0 <4.5.1

vigor3910 4.4.3.6

Vigor 2927 LTE 4.5.1

Vigor2962 4.4.5.1

Vigor2765 4.5.1

Vigor2766 4.5.1

Vigor2862 0 <3.9.9.12

Vigor 2927 LTE 0 <4.5.1

Vigor2915 4.4.6.1

Vigor2926 0 <3.9.9.12

Vigor2866 LTE 0 <4.5.1

Vigor2865L-5G Series 4.5.1

Vigor2865L-5G Series 0 <4.5.1

Vigor2865 4.5.1

Vigor2763 4.5.1

Vigor2865 LTE Series 4.5.1

Vigor2927L-5G 0 <4.5.1

Vigor2865 LTE Series 0 <4.5.1

Vigor2866 4.5.1

Vigor2862 3.9.9.12

Vigor2927 4.5.1

Vigor2865 0 <4.5.1

Vigor2763 0 <4.5.1

Vigor2866 LTE 4.5.1

vigor3910 0 <4.4.3.6

Vigor2765 0 <4.5.1

Vigor2866 1.0 <4.5.1

Vigor2927 0 <4.5.1

Vigor2862 LTE 0 <3.9.9.12

Affected Packages

euvd vigor1000b fix: 4.4.5.1

euvd vigor2135 fix: 4.5.1

euvd vigor2763 fix: 4.5.1

euvd vigor2765 fix: 4.5.1

euvd vigor2766 fix: 4.5.1

euvd vigor2862 fix: 3.9.9.12

euvd vigor2862_lte fix: 3.9.9.12

euvd vigor2865 fix: 4.5.1

euvd vigor2865_lte_series fix: 4.5.1

euvd vigor2865l_5g_series fix: 4.5.1

euvd vigor2866 fix: 4.5.1

euvd vigor2866_lte fix: 4.5.1

euvd vigor2915 fix: 4.4.6.1

euvd vigor2926 fix: 3.9.9.12

euvd vigor2927 fix: 4.5.1

euvd vigor2927l_5g fix: 4.5.1

euvd vigor2962 fix: 4.4.5.1

euvd vigor3910 fix: 4.4.3.6

euvd vigor3912 fix: 4.4.5.1

euvd vigor_2927_lte fix: 4.5.1

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 20 packages in euvd

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

Technical ContextAI · show details

Uninitialized variable in CGI request processing.

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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

Analysis Updated

Apr 16, 2026 - 05:50 EUVD-patch-fix

executive summary

Patch available

Apr 16, 2026 - 05:29 EUVD

4.4.5.1,4.4.6.1,4.5.1

CVE Published

Oct 03, 2025 - 12:15 nvd

CRITICAL 9.8

DescriptionCVE.org

An uninitialized variable in the HTTP CGI request arguments processing component of Vigor Routers running DrayOS may allow an attacker the ability to perform RCE on the appliance through memory corruption.

Executive ViewAI

Why It Matters

CVE-2025-10547 is a critical remote code execution vulnerability affecting Vigor Router devices running DrayOS, with a CVSS score of 9.8 that allows unauthenticated attackers to execute arbitrary commands through HTTP CGI endpoints. This poses immediate risk to network perimeter security and could enable full compromise of affected routers, potentially granting attackers internal network access.

Business Impact: Severe

Compensating Controls

Apply vendor patch. Interim mitigations pending patch availability: restrict HTTP/HTTPS access to router management interfaces via firewall rules (allow only from trusted administrative networks), disable unnecessary CGI services if supported by device firmware, and implement network segmentation to limit lateral movement if router compromise occurs.

Threat Intelligence Overview

EPSS Score

0.1%

Top 81% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

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 No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

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

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +49

PoC: 0

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.