Which versions of A7000r Firmware are affected by CVE-2026-1548?

Organizations using A flaw should be aware of moderate risk from CVE-2026-1548, a injection vulnerability rated CVSS 6.3. Exploitation could allow attackers to execute code or inject malicious input.

Is there a public PoC exploit available for CVE-2026-1548?

Yes, a public proof-of-concept exploit is available for CVE-2026-1548. Prioritise patching immediately. EPSS: 0.8%.

How to fix or mitigate CVE-2026-1548?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

A7000r Firmware CVE-2026-1548

Q: What is the CVSS score of CVE-2026-1548?

CVE-2026-1548 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: 0.8%.

LOW

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)

2026-01-28 cna@vuldb.com

Command Injection A7000r Firmware TOTOLINK

2.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.1 LOW

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

6.3 (MEDIUM) 2.1 (LOW)

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 09, 2026 - 16:34 vuln.today

Public exploit code

CVE Published

Jan 28, 2026 - 23:15 nvd

MEDIUM 6.3

DescriptionCVE.org

A flaw has been found in Totolink A7000R 4.1cu.4154. This impacts the function CloudACMunualUpdateUserdata of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument url causes command injection. The attack can be initiated remotely. The exploit has been published and may be used.

AnalysisAI

Command injection in Totolik A7000R firmware (version 4.1cu.4154) via the CloudACManualUpdateUserdata function allows authenticated remote attackers to execute arbitrary commands through a crafted url parameter. Public exploit code exists for this vulnerability and no patch is currently available.

Technical ContextAI

Affects A7000R Firmware. A flaw has been found in Totolink A7000R 4.1cu.4154. This impacts the function CloudACMunualUpdateUserdata of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument url causes command injection. The attack can be initiated remotely. The exploit has been published and may be used.