CVE-2023-42769Public exploitNetwork attack vector

Authentication bypass via brute-forceable session cookies

Published Oct 26, 2023 · Updated Jan 16, 2025

Insufficient session-ID entropy in Sielco Radio Link and Analog FM transmitters allows remote attackers to hijack sessions and control devices. The web interfaces issue short id cookie values that can be enumerated by brute force until a live authenticated session is found. No credentials or user interaction are required; a valid guessed cookie bypasses authentication and permits transmitter manipulation.

CVSS severity9.8
Critical
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Insufficient session-ID entropy in Sielco Radio Link and Analog FM transmitters allows remote attackers to hijack sessions and control devices. The web interfaces issue short id cookie values that can be enumerated by brute force until a live authenticated session is found. No credentials or user interaction are required; a valid guessed cookie bypasses authentication and permits transmitter manipulation.

The record

CVE
CVE-2023-42769
Published
Oct 26, 2023
Updated
Jan 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-307, CWE-284, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
CWE-284Improper Access Control
T1110Brute Force

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo