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CVE-2021-44693

MEDIUM
4.9
CVSS Score
Published: December 13, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:12 AM UTC
249 products affected across 1 vendorSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP FirmwareSIMATIC S7-1500 CPU 1511-1 Pn FirmwareSIMATIC S7-1500 CPU 1515-2 Pn Firmware

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Severity
MEDIUM4.9
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SIMATIC Et 200 Sp Open Controller CPU 1515SP Pc Firmware· Siemens
95%
All versions
siemens-simatic-et-200-sp-open-controller-cpu-1515sp-pc (same device)
SIMATIC S7-1200 CPU 12 1211C Firmware· Siemens
95%
v < 4.6.0
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu-12-1211c (same device)
SIMATIC S7-1200 CPU 12 1212C Firmware· Siemens
95%
v < 4.6.0
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu-12-1212c (same device)
SIMATIC S7-1200 CPU 12 1212FC Firmware· Siemens
95%
v < 4.6.0
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu-12-1212fc (same device)
SIMATIC S7-1200 CPU 12 1214C Firmware· Siemens
95%
v < 4.6.0
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu-12-1214c (same device)
SIMATIC S7-1200 CPU 12 1214FC Firmware· Siemens
95%
v < 4.6.0
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu-12-1214fc (same device)
SIMATIC S7-1200 CPU 12 1215C Firmware· Siemens
95%
v < 4.6.0
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu-12-1215c (same device)
SIMATIC S7-1200 CPU 12 1215FC Firmware· Siemens
95%
v < 4.6.0
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu-12-1215fc (same device)
SIMATIC S7-1200 CPU 12 1217C Firmware· Siemens
95%
v < 4.6.0
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu-12-1217c (same device)
SIMATIC S7-1200 CPU 1211C Firmware· Siemens
95%
v < 4.6.0
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu-1211c (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

PatchVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-382653.pdf

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.9MEDIUMsiemens
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1284

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