Neon Goes Dark After Exposing Users' Phone Numbers, Call Recordings, Transcripts

An anonymous reader quotes a report from TechCrunch: A viral app called Neon, which offers to record your phone calls and pay you for the audio so it can sell that data to AI companies, has rapidly risen to the ranks of the top-five free iPhone apps since its launch last week. The app already has thousands of users and was downloaded 75,000 times yesterday alone, according to app intelligence provider Appfigures. Neon pitches itself as a way for users to make by providing call recordings that help train, improve, and test AI models. But now Neon has gone offline, at least for now, after a security flaw allowed anyone to access the phone numbers, call recordings, and transcripts of any other user, TechCrunch can now report.

TechCrunch discovered the security flaw during a short test of the app on Thursday. We alerted the app's founder, Alex Kiam (who previously did not respond to a request for comment about the app), to the flaw soon after our discovery. Kiam told TechCrunch later Thursday that he took down the app's servers and began notifying users about pausing the app, but fell short of informing his users about the security lapse. The Neon app stopped functioning soon after we contacted Kiam. TechCrunch found that the app's backend services didn't properly restrict access, allowing any logged-in user to request and receive data belong to other users. This included call transcripts, raw call recordings, and sensitive metadata, including phone numbers, the date/time of calls, and their durations.

Read more of this story at Slashdot.

nmap -sV --script vuln -p- <target-network>

tail -f /var/log/suricata/fast.log | grep <cve>

Check Vendor Security Advisory Bulletin

title: Detect Exploitation - Neon Goes Dark After Exposing Users' Phone Numbers, Call Recordings, Transcripts
id: db005988-d02f-4441-b43f-7406b1af0e08
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
  - https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
  category: network_connection
  product: any
detection:
  selection:
      CommandLine|contains:
        - 'exploit'
  condition: selection
falsepositives:
  - Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
  - attack.initial_access

rule CTI_Threat_Indicator {
    meta:
        author = "iShareStuff CTI Automated Detection Engine"
        date = "2026-09-24"
        description = "YARA Signature for "
    strings:
        $str = "Neon Goes Dark After Exposing " ascii wide
    condition:
        any of them
}