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Dir 816 Firmware EUVDEUVD-2025-19574

| CVE-2025-45931 CRITICAL
Command Injection (CWE-77)
2025-06-30 cve@mitre.org
9.8
CVSS 3.1 · Vendor: mitre
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Command injection prevention
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.

Impact

Full system compromise — the attacker can execute any command with the privileges of the vulnerable application process. With a CVSS score of 9.8 (CRITICAL), this represents a critical risk.

Exploit ScenarioDerived

An attacker injects shell metacharacters (;, |, &&) into a parameter that is passed to a system command, causing additional commands to be executed.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.
No patch listed yet 1.5% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 16, 2026

An issue D-Link DIR-816-A2 DIR-816A2_FWv1.10CNB05_R1B011D88210 allows a remote attacker to execute arbitrary code via system() function in the bin/goahead file

Earlier versions of this analysis (1)
v1 Mar 16, 2026 - 01:25 CVSS 9.8

RemediationAI

Avoid passing user input to system commands. Use language-specific APIs instead of shell commands. If unavoidable, use strict input validation and escaping.

Affected VersionsENISA

n/a n/a

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

Command injection allows an attacker to execute arbitrary OS commands on the host system through a vulnerable application that passes user input to system shells.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (mitre) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (mitre) · only source for this CVE.

CVSS VectorVendor: mitre

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
PoC Detected
Jul 08, 2025 - 14:13 vuln.today
Public exploit code
CVE Published
Jun 30, 2025 - 17:15 nvd
CRITICAL 9.8

Executive ViewAI

Why It Matters

CVE-2025-45931 presents critical security risk, a command injection vulnerability rated CVSS 9.8. Successful exploitation could allow attackers to execute arbitrary code or commands on affected systems, potentially leading to full system compromise. Proof-of-concept code is publicly available, increasing the risk of exploitation. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.

Business Impact: Severe
Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Deploy WAF rules to block injection patterns; (2) Restrict network access to affected components; (3) Enable enhanced logging for suspicious activity.

Threat Intelligence Overview

EPSS Score
1.5%
Top 19% exploitable
Exploit
POC
Public exploit code exists
Data Quality
5 sources
Confidence: Medium

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 1.5%
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

70
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +49
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

CVE-2024-24321 CRITICAL POC
9.8 Feb 08

An issue in Dlink DIR-816A2 v.1.10CNB05 allows a remote attacker to execute arbitrary code via the wizardstep4_ssid_2 pa

CVE-2025-5623 CRITICAL POC
9.8 Jun 05

Critical stack-based buffer overflow vulnerability in D-Link DIR-816 1.10CNB05 affecting the qosClassifier function's di

CVE-2025-5630 CRITICAL POC
9.8 Jun 05

Critical stack-based buffer overflow vulnerability in D-Link DIR-816 firmware version 1.10CNB05 affecting the /goform/fo

CVE-2025-5624 CRITICAL POC
9.8 Jun 05

Critical stack-based buffer overflow vulnerability in D-Link DIR-816 firmware version 1.10CNB05 affecting the QoSPortSet

CVE-2025-5622 CRITICAL POC
9.8 Jun 05

Critical stack-based buffer overflow vulnerability in D-Link DIR-816 wireless router (version 1.10CNB05) affecting the 5

CVE-2022-43003 CRITICAL POC
9.8 Oct 26

D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the pskValue parameter in the setRepeaterSecur

CVE-2022-43002 CRITICAL POC
9.8 Oct 26

D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the wizardstep54_pskpwd parameter at /goform/f

CVE-2022-43001 CRITICAL POC
9.8 Oct 26

D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the pskValue parameter in the setSecurity func

CVE-2022-43000 CRITICAL POC
9.8 Oct 26

D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the wizardstep4_pskpwd parameter at /goform/fo

CVE-2022-42998 CRITICAL POC
9.8 Oct 26

D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the srcip parameter at /goform/form2IPQoSTcAdd

CVE-2022-37130 CRITICAL POC
9.8 Aug 31

In D-Link DIR-816 A2_v1.10CNB04, DIR-878 DIR_878_FW1.30B08.img a command injection vulnerability occurs in /goform/Diagn

CVE-2022-37125 CRITICAL POC
9.8 Aug 31

D-link DIR-816 A2_v1.10CNB04.img is vulnerable to Command injection via /goform/NTPSyncWithHost. Rated critical severity

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