HOMEVULNERABILITIESCVE-2018-5455
CRITICAL

CVE-2018-5455

CWE-565Published: March 5, 2018· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2018-5455 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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 complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

moxa8 product(s)
oncell g3110-hspa firmwareoncell g3110-hspaoncell g3110-hspa-t firmwareoncell g3110-hspa-toncell g3150-hspa firmwareoncell g3150-hspaoncell g3150-hspa-t firmwareoncell g3150-hspa-t
Source: NVD CPE · 8 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
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

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

All References (2)

→
https://ics-cert.us-cert.gov/advisories/ICSA-18-060-02Patch · Third Party Advisory · US Government Resource
→
https://ics-cert.us-cert.gov/advisories/ICSA-18-060-02Patch · Third Party Advisory · US Government Resource

Quick Facts

CVE IDCVE-2018-5455
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-565
CISA KEVNo
Affected1 vendor(s)
PublishedMar 5, 2018

Related CVEs (CWE-565)

CVE-2024-0947
9.8
CVE-2023-41084
9.8
CVE-2019-7266
9.8
CVE-2018-5190
9.8
CVE-2018-20512
9.8
CVE-2025-2395
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-5455 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.COM. CVE data is provided under the NVD usage policy.
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