CVE-2019-7440: JioFi 4G M2S 1.0.2 devices have CSRF via the SSID name and Security Key field under Edit Wi-Fi Settings (aka a

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MEDIUM 6.5MITIGATE

CVE-2019-7440 is a medium-severity flaw (CVSS 6.5) affecting jiofi 4g m2s firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

JioFi 4G M2S 1.0.2 devices have CSRF via the SSID name and Security Key field under Edit Wi-Fi Settings (aka a SetWiFi_Setting request to cgi-bin/qcmap_web_cgi).

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.0% (top 20%)
CISA exploited list	No
Weakness	CWE-352
Published	2019-03-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jio

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-03-21 16:01 UTCPublished CVE record published
2026-06-17 02:40 UTCUpdated Record last modified

jio jiofi 4g m2s firmware MITIGATE

Affected: 1.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.2

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: JioFi 4G M2S 1.0.2 - Cross-Site Request Forgery

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-7440?

jiofi 4g m2s firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-7440 being exploited?

CVE-2019-7440 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-7440 affect?

CVE-2019-7440 affects jiofi 4g m2s firmware. Severity is medium (CVSS 6.5). JioFi 4G M2S 1.0.2 devices have CSRF via the SSID name and Security Key field under Edit Wi-Fi Settings (aka a SetWiFi_Setting request to cgi-bin/qcmap_web_cgi).

How urgent is CVE-2019-7440?

Priority 48/100. Public exploit reference

Software pages

Wi-Fi vulnerabilities

Related CVEs

CVE-2019-7439 MEDIUM 6.5 MITIGATE cgi-bin/qcmap_web_cgi on JioFi 4G M2S 1.0.2 devices allows a DoS (Hang) via the mask POST parameter.
CVE-2019-7438 MEDIUM 6.1 MITIGATE cgi-bin/qcmap_web_cgi on JioFi 4G M2S 1.0.2 devices has XSS and HTML injection via the mask POST parameter.

References

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