What is the CVSS score of CVE-2016-1555?

CVE-2016-1555 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: 94.3%.

Is there a public PoC exploit available for CVE-2016-1555?

Yes, a public proof-of-concept exploit is available for CVE-2016-1555. Prioritise patching immediately. EPSS: 94.3%.

Is there a patch available for CVE-2016-1555?

Yes, a patch is available for CVE-2016-1555. Update the affected software to the latest version immediately.

PHP CVE-2016-1555

CRITICAL

Command Injection (CWE-77)

2017-04-21 cret@cert.org

PHP Command Injection Netgear

9.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-77 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. Sign in to read
Impact	CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. CISA has confirmed active exploitation in the wild. Public proof-of-concept exploit code is available. EPSS exploitation probability: 94.33%.
Exploit ScenarioDerived	A remote attacker could inject arbitrary commands into system command execution by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 94.3% exploitation probability (EPSS)

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AnalysisAI

(1) boardData102.php, (2) boardData103.php, (3) boardDataJP.php, (4) boardDataNA.php, and (5) boardDataWW.php in Netgear WN604 before 3.3.3 and WN802Tv2, WNAP210v2, WNAP320, WNDAP350, WNDAP360, and. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Use parameterized APIs, avoid shell execution, validate input with strict allowlists.

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

This vulnerability is classified as Command Injection (CWE-77), which allows attackers to inject arbitrary commands into system command execution. (1) boardData102.php, (2) boardData103.php, (3) boardDataJP.php, (4) boardDataNA.php, and (5) boardDataWW.php in Netgear WN604 before 3.3.3 and WN802Tv2, WNAP210v2, WNAP320, WNDAP350, WNDAP360, and WNDAP660 before 3.5.5.0 allow remote attackers to execute arbitrary commands. Affected products include: Netgear Wnap320 Firmware, Netgear Wndap350 Firmware, Netgear Wndap360 Firmware, Netgear Wndap210V2 Firmware, Netgear Wn604 Firmware. Version information: before 3.3.3.

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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

Added to CISA KEV

Apr 21, 2026 - 15:31 CISA

CVE Published

Apr 21, 2017 - 15:59 cve.org

CRITICAL 9.8

DescriptionCVE.org

Threat Intelligence Overview

Threat Score

7.8/10

Composite threat intelligence

EPSS Score

94.3%

Top 0% exploitable

Exploit

POC

Public exploit code exists

Data Quality

6 sources

Confidence: High

NVD

CVE.org

CISA KEV

EPSS POC (2)

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 Yes

Public POC Yes

EPSS 94.3%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch 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

Immediate

Exploitation· derived

Active

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

High

Priority Score

228

Low Medium High Critical

KEV: +50

EPSS: +94

CVSS: +49

PoC: +20

Weaponized: +15

Threat intel: 0

Gov advisory: 0

Attack Technique

OS Command Injection CRITICAL

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

Affected Products (CPE)CVE.org

cpe:2.3:o:netgear:wnap320_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:wndap350_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:wndap360_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:wndap210v2_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:wn604_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:wndap660_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:wn802tv2_firmware:*:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://kb.netgear.com/30480/CVE-2016-1555-Notification?cid=wmt_netgear_organic REF http://packetstormsecurity.com/files/135956/D-Link-Netgear-FIRMADYNE-Command-Injection-Buffer-Overflow.html REF http://seclists.org/fulldisclosure/2016/Feb/112 REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-1555

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