Is there a public PoC exploit available for CVE-2026-5178?

Yes, a public proof-of-concept exploit is available for CVE-2026-5178. Prioritise patching immediately. EPSS: 0.7%.

Totolink A3300R CVE-2026-5178

Q: What is the CVSS score of CVE-2026-5178?

CVE-2026-5178 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.7%.

EUVD-2026-17309 LOW

Command Injection (CWE-77)

2026-03-31 VulDB

GHSA-w3qx-79f2-f95x

Command Injection

2.1

CVSS 4.0

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

5.3 (MEDIUM) 2.1 (LOW)

PoC Detected

Apr 06, 2026 - 15:21 vuln.today

Public exploit code

EUVD ID Assigned

Mar 31, 2026 - 03:45 euvd

EUVD-2026-17309

Analysis Generated

Mar 31, 2026 - 03:45 vuln.today

CVE Published

Mar 31, 2026 - 03:00 nvd

MEDIUM 5.3

DescriptionNVD

A security vulnerability has been detected in Totolink A3300R 17.0.0cu.557_b20221024. Affected by this issue is the function setIptvCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument vlanPriLan3 leads to command injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.

AnalysisAI

Command injection in Totolink A3300R firmware 17.0.0cu.557_b20221024 allows authenticated remote attackers to execute arbitrary commands via the vlanPriLan3 parameter in the setIptvCfg function of /cgi-bin/cstecgi.cgi. The vulnerability has a publicly available exploit and carries moderate severity (CVSS 6.3) with confirmed exploitability signals (EPSS P/E indicator). …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

CVE-2026-5178 vulnerability details – vuln.today

Back