Skip to content
Fencer Vulns
high 7.5

CVE-2024-43647 json

A vulnerability has been identified in SIMATIC S7-200 SMART CPU CR40 (6ES7288-1CR40-0AA0) (All versions), SIMATIC S7-200 SMART CPU CR60 (6E…

published 2024-09-10 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-40418

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

A vulnerability has been identified in SIMATIC S7-200 SMART CPU CR40 (6ES7288-1CR40-0AA0) (All versions), SIMATIC S7-200 SMART CPU CR60 (6ES7288-1CR60-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA1) (All versions). Affected devices do not properly handle TCP packets with an incorrect structure. This could allow an unauthenticated remote attacker to cause a denial of service condition. To restore normal operations, the network cable of the device needs to be unplugged and re-plugged.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-261-01 updated cvss 7.5

Siemens SIMATIC S7-200 SMART Devices

  • Siemens SIMATIC S7-200 SMART CPU CR40 (6ES7288-1CR40-0AA0) Siemens SIMATIC S7-200 SMART CPU CR60 (6ES7288-1CR60-0AA0) Siemens SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA0) Siemens SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA1) Siemens SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA0) Siemens SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA1)
    +12 more products
    Siemens SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA0) Siemens SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA1) Siemens SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA0) Siemens SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA1) Siemens SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA0) Siemens SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA1) Siemens SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA0) Siemens SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA1) Siemens SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA0) Siemens SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA1) Siemens SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA0) Siemens SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA1)
    affected: mitigation, no fix planned

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:T/RC:C
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Siemens SIMATIC S7-200 SMART CPU CR40
  • Siemens SIMATIC S7-200 SMART CPU CR60
  • Siemens SIMATIC S7-200 SMART CPU SR20
  • Siemens SIMATIC S7-200 SMART CPU SR30
  • Siemens SIMATIC S7-200 SMART CPU SR40
  • Siemens SIMATIC S7-200 SMART CPU SR60
  • Siemens SIMATIC S7-200 SMART CPU ST20
  • Siemens SIMATIC S7-200 SMART CPU ST30
  • Siemens SIMATIC S7-200 SMART CPU ST40
  • Siemens SIMATIC S7-200 SMART CPU ST60
  • siemens simatic_s7-200_smart_cpu_st60

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.