Medium severity6.3NVD Advisory· Published Mar 30, 2026· Updated Apr 29, 2026

CVE-2026-5103

Description

A weakness has been identified in Totolink A3300R 17.0.0cu.557_b20221024. This issue affects the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument enable causes command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Totolink/A3300r Firmware
cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:*:*:*:*:*:*:*
Totolink/A3300Rllm-fuzzy
Range: = 17.0.0cu.557_b20221024

Patches

Vulnerability mechanics

References

github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_enable_cmd_injectnvdExploitThird Party Advisory
vuldb.com/vuln/354128nvdThird Party AdvisoryVDB Entry
vuldb.com/vuln/354128/ctinvdThird Party AdvisoryVDB Entry
vuldb.com/submit/779140nvdPermissions RequiredVDB Entry
www.totolink.netnvdProduct

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

6.3/ 10

CVSS v42.1

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
Complexity: Low
Privileges: Low
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: Low

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

EPSS

Probability of exploitation in the next 30 days.

3.64%

VYPR risk score

Composite of severity, exploitation, and reach.

0.41medium

cvss	0.410
epss	0.003
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-74
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77
Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVE ID

CVE-2026-5103

Credits

L(
LvHW (VulDB User)
reporter