MEDIUMPOC
CVE-2019-7439
NVD-CWE-noinfoPublished: March 21, 2019· Updated: Jun 17, 2026
6.5
CVSS v3.1
Official Description
cgi-bin/qcmap_web_cgi on JioFi 4G M2S 1.0.2 devices allows a DoS (Hang) via the mask POST parameter.
Technical Analysis
CVE-2019-7439 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.
A proof-of-concept (PoC) exploit exists for CVE-2019-7439. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
jio2 product(s)
jiofi 4g m2s firmwarejiofi 4g m2s
Source: NVD CPE · 2 total CPE entries
Exploit & PoC Resources
POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (6)
→
http://packetstormsecurity.com/files/152626/JioFi-4G-M2S-1.0.2-Denial-Of-Service.htmlExploit · Third Party Advisory · VDB Entry
→
https://gkaim.com/cve-2019-7439-vikas-chaudhary/Exploit · Third Party Advisory
→
https://www.exploit-db.com/exploits/46752/Exploit · Third Party Advisory · VDB Entry
→
http://packetstormsecurity.com/files/152626/JioFi-4G-M2S-1.0.2-Denial-Of-Service.htmlExploit · Third Party Advisory · VDB Entry
→
https://gkaim.com/cve-2019-7439-vikas-chaudhary/Exploit · Third Party Advisory
→
https://www.exploit-db.com/exploits/46752/Exploit · Third Party Advisory · VDB Entry
Quick Facts
CVE IDCVE-2019-7439
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedMar 21, 2019
Related CVEs (NVD-CWE-noinfo)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-7439 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.