CVE-2019-3921

Name: CVE-2019-3921
Creator: NVD / NIST
Published: 2019-03-05T21:29:00.447+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 18.21%

Last modified Jun 17, 2026

CVE-2019-3921 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The Alcatel Lucent I-240W-Q GPON ONT using firmware version 3FE54567BOZJ19 is vulnerable to a stack buffer overflow via crafted HTTP POST request sent by a remote, authenticated attacker to /GponForm/usb_Form?script/. An attacker can leverage this vulnerability to potentially execute arbitrary code.. EPSS estimates a 18.21% chance of exploitation in the next 30 days.

Description

The Alcatel Lucent I-240W-Q GPON ONT using firmware version 3FE54567BOZJ19 is vulnerable to a stack buffer overflow via crafted HTTP POST request sent by a remote, authenticated attacker to /GponForm/usb_Form?script/. An attacker can leverage this vulnerability to potentially execute arbitrary code.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

18.21%

96.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nokia	I-240w-Q Gpon Ont Firmware	3fe54567bozj19

References

https://www.exploit-db.com/exploits/46469/Exploit, Third Party Advisory, VDB Entry
https://www.tenable.com/security/research/tra-2019-09Exploit, Third Party Advisory
https://www.exploit-db.com/exploits/46469/Exploit, Third Party Advisory, VDB Entry
https://www.tenable.com/security/research/tra-2019-09Exploit, Third Party Advisory

Timeline

Published: Mar 5, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-3921?

How severe is CVE-2019-3921?

CVE-2019-3921 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 18.21% probability of exploitation in the next 30 days.

How do I fix CVE-2019-3921?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-3921?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST