CVE-2024-47945Public exploitNetwork attack vector

Unauthenticated session hijacking via predictable session IDs

Published Oct 15, 2024 · Updated Nov 3, 2025

Predictable session IDs in Rittal IoT Interface and CMC III firmware before 6.21.00.2 allow remote attackers to hijack active sessions. The json.cgi generate_sessionID function calls rand() before srand(), so the first random value is constant and only the process ID effectively seeds later output. An attacker needs network access and an active victim session; successful prediction grants the victim's web-interface privileges without credentials.

CVSS severity9.1
Critical
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable session IDs in Rittal IoT Interface and CMC III firmware before 6.21.00.2 allow remote attackers to hijack active sessions. The json.cgi generate_sessionID function calls rand() before srand(), so the first random value is constant and only the process ID effectively seeds later output. An attacker needs network access and an active victim session; successful prediction grants the victim's web-interface privileges without credentials.

The record

CVE
CVE-2024-47945
Published
Oct 15, 2024
Updated
Nov 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-340, CWE-331, CAPEC-59, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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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

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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-340Generation of Predictable Numbers or Identifiers
CWE-331Insufficient Entropy
CAPEC-59Session Credential Falsification through Prediction
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

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

Technologies

Your stack

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Your stack

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