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CVE-2018-5258

21
FAUCET Score

CVE-2018-5258 describes a critical vulnerability in the Neon app for iOS (version 1.6.14) where it fails to properly validate X.509 certificates from SSL servers. This flaw allows remote attackers to spoof legitimate servers, potentially leading to the interception and compromise of sensitive user information. The vulnerability has a CVSS score of 5.9 (Medium), indicating a high potential for confidentiality impact with a network attack vector and high attack complexity. Despite its severity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.6.14CPE matchmatch criteria
cpe:2.3:a:banconeon:neon:1.6.14:*:*:*:*:iphone_os:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.85%
Probability of exploitation in next 30 days
EPSS Percentile
54.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0085 is in the 12th percentile among its peer group of 19,954 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

gist.github.com / rlaneth/d2203c206d5d5acbdaf6069e78b1d07f
Issue TrackingThird Party Advisory
radialle.com / cve-2018-5258-writeup-aplicativo-do-banco-neon-para-ios-n%C3%A3o-valida-certificados-ssl-84bed0b0cecb
Third Party Advisory
tecmundo.com.br / seguranca/126192-banco-neon-falha-permite-hacker-acesse-conta-roube-dados-clientes.htm
Third Party Advisory