A Reliance on Cookies without Validation and Integrity Checking issue was discovered in Moxa OnCell G3100-HSPA Series version 1.4 Build 160…

published 2018-03-05 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-17225

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

A Reliance on Cookies without Validation and Integrity Checking issue was discovered in Moxa OnCell G3100-HSPA Series version 1.4 Build 16062919 and prior. The application allows a cookie parameter to consist of only digits, allowing an attacker to perform a brute force attack bypassing authentication and gaining access to device functions.

Patch / fix

links 1

ics-cert.us-cert.gov/advisories/ICSA-18-060-02 advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-060-02 updated 2018-03-01 cvss 9.8

Moxa OnCell G3100-HSPA Series

Moxa OnCell G3100-HSPA Series <=1.4 Build 160062919
affected: mitigation “Moxa has released new firmware for OnCell G3100-HSPA that is available via the following link:” moxa.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.56% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

n/a Moxa OnCell G3100-HSPA Series

Classification

Weakness

CWE-565 Reliance on Cookies without Validation and Integrity Checking
CWE-287 Improper Authentication

References

ics-cert.us-cert.gov /advisories/ICSA-18-060-02
patch, third-party-advisory, us-government-resource

Sources

CVE List CVE-2018-5455
NVD CVE-2018-5455

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary