CVE-2024-41977Network attack vector

Authenticated privilege escalation via cross-session data exposure

Published Aug 13, 2024 · Updated Aug 13, 2024

Session isolation failure in Siemens industrial routers before 8.1 allows remote authenticated users to escalate privileges through the web interface. The embedded web server fails to keep one account's session data separated from other sessions, causing data to be provided to or used by the wrong session. Exploitation requires a low-privileged account, active interaction by another user, and a high-complexity session condition; successful access grants elevated control over the device.

CVSS severity7.3
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session isolation failure in Siemens industrial routers before 8.1 allows remote authenticated users to escalate privileges through the web interface. The embedded web server fails to keep one account's session data separated from other sessions, causing data to be provided to or used by the wrong session. Exploitation requires a low-privileged account, active interaction by another user, and a high-complexity session condition; successful access grants elevated control over the device.

The record

CVE
CVE-2024-41977
Published
Aug 13, 2024
Updated
Aug 13, 2024
Vendor
Siemens
Product
SCALANCE MUM856-1 (RoW)
Classifications
CWE-488, CAPEC-59, CAPEC-60, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <V8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · SCALANCE MUM856-1 (RoW)version=0 <V8.1
Siemens · SCALANCE MUM856-1 (B1)version=0 <V8.1
Siemens · SCALANCE MUM856-1 (EU)version=0 <V8.1
Siemens · RUGGEDCOM RM1224 Firmwareversion=6.2 <v8.1
Siemens · RUGGEDCOM RM1224 LTE(4G) NAMversion=0 <V8.1
Siemens · RUGGEDCOM RM1224 LTE(4G) EUversion=0 <V8.1
Siemens · SCALANCE M874-3version=0 <V8.1
Siemens · SCALANCE MUM856-1 (A1)version=0 <V8.1
Siemens · SCALANCE MUM853-1 (B1)version=0 <V8.1
Siemens · SCALANCE MUM856-1 (CN)version=0 <V8.1
Siemens · SCALANCE M812-1 ADSL Routerversion=0 <V8.1
Siemens · SCALANCE S615 EEC LAN Routerversion=0 <V8.1
Siemens · SCALANCE M826-2 SHDSL-Routerversion=0 <V8.1
Siemens · SCALANCE M816-1 ADSL Routerversion=0 <V8.1
Siemens · SCALANCE M876-3 (ROK)version=0 <V8.1
Siemens · SCALANCE M876-3version=0 <V8.1
Siemens · SCALANCE MUM853-1 (A1)version=0 <V8.1
Siemens · SCALANCE M804PBversion=0 <V8.1
Siemens · SCALANCE M876-4version=0 <V8.1
Siemens · SCALANCE M876-4 (NAM)version=0 <V8.1
Siemens · SCALANCE MUM853-1 (EU)version=0 <V8.1
Siemens · SCALANCE S615 LAN-Routerversion=0 <V8.1
Siemens · SCALANCE M876-4 (EU)version=0 <V8.1
Siemens · SCALANCE M874-3 3G-Router (CN)version=0 <V8.1
Siemens · SCALANCE M874-2version=0 <V8.1

Published CVSS scores

8.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
7.1Siemens AGCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
7.3Siemens AGCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-488Exposure of Data Element to Wrong Session
CAPEC-59Session Credential Falsification through Prediction
CAPEC-60Reusing Session IDs (aka Session Replay)
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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