CVE-2019-7439

MEDIUM

JioFi 4G M2S 1.0.2 - Denial of Service via mask POST Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-7439. PoCs published by Vikas Chaudhary.

AI-analyzed exploit summary This exploit demonstrates a DoS vulnerability in JioFi 4G M2S routers by sending a malformed POST request to the `mask` parameter in `/cgi-bin/qcmap_web_cgi`, causing the device to hang and require a physical reset.

Description

cgi-bin/qcmap_web_cgi on JioFi 4G M2S 1.0.2 devices allows a DoS (Hang) via the mask POST parameter.

Exploits (1)

exploitdb WORKING POC
by Vikas Chaudhary · textdoshardware
https://www.exploit-db.com/exploits/46752

This exploit demonstrates a DoS vulnerability in JioFi 4G M2S routers by sending a malformed POST request to the `mask` parameter in `/cgi-bin/qcmap_web_cgi`, causing the device to hang and require a physical reset.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: JioFi 4G Hotspot M2S 150 Mbps Wireless Router (Firmware 1.0.2)
No auth needed
Prerequisites: Network access to the router's web interface · Burp Suite or similar tool for request manipulation
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory x_refsource_misc
https://gkaim.com/cve-2019-7439-vikas-chaudhary/
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/46752/
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/152626/JioFi-4G-M2S-1.0.2-Denial-Of-Service.html

Scores

CVSS v3 6.5
EPSS 0.0477
EPSS Percentile 90.8%
Attack Vector ADJACENT_NETWORK
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (1)
jio/jiofi_4g_m2s_firmware 1.0.2
Published Mar 21, 2019
Tracked Since Feb 18, 2026