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CVE-2019-7439

27
FAUCET Score

CVE-2019-7439 is a Denial of Service (DoS) vulnerability affecting JioFi 4G M2S 1.0.2 devices, specifically within the cgi-bin/qcmap_web_cgi component. An attacker can trigger a device hang by sending a crafted POST request to the 'mask' parameter. This vulnerability has a CVSS score of 6.5 (Medium), indicating it can be exploited with low attack complexity over an adjacent network without user interaction, leading to high availability impact. While not listed in CISA's KEV catalog, an exploit is publicly available on ExploitDB, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.2CPE matchmatch criteria
cpe:2.3:o:jio:jiofi_4g_m2s_firmware:1.0.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.77%
Probability of exploitation in next 30 days
EPSS Percentile
91.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-46752 · Apr 25, 2019
This CVE's current EPSS score of 0.0477 is in the 98th percentile among its peer group of 1,802 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/152626/JioFi-4G-M2S-1.0.2-Denial-Of-Service.html
ExploitThird Party AdvisoryVDB Entry
gkaim.com / cve-2019-7439-vikas-chaudhary
ExploitThird Party Advisory
exploit-db.com / exploits/46752
ExploitThird Party AdvisoryVDB Entry