ICSA-21-159-13: Siemens SIMATIC RFID (Update B)
CISA advisory · released 2021-06-08
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 4, 2025-05-06 (final)
CISA's summary
Summary: The latest updates for SIMATIC RF products fix a vulnerability that could allow an unauthorized attacker to crash the OPC UA service of the affected devices. Siemens has released updates for the affected products and recommends to update to the latest versions.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC Reader RF610R CMIIT | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF610R ETSI | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF610R FCC | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF615R CMIIT | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF615R ETSI | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF615R FCC | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF650R ARIB | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF650R CMIIT | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF650R ETSI | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF650R FCC | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF680R ARIB | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF680R CMIIT | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF680R ETSI | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF680R FCC | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF685R ARIB | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF685R CMIIT | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF685R ETSI | >V3.0|<V4.0 |
| Siemens | SIMATIC Reader RF685R FCC | >V3.0|<V4.0 |
| Siemens | SIMATIC RF166C | >V1.1|<V1.3.2 |
| Siemens | SIMATIC RF185C | >V1.1|<V1.3.2 |
| Siemens | SIMATIC RF186C | >V1.1|<V1.3.2 |
| Siemens | SIMATIC RF186CI | >V1.1|<V1.3.2 |
| Siemens | SIMATIC RF188C | >V1.1|<V1.3.2 |
| Siemens | SIMATIC RF188CI | >V1.1|<V1.3.2 |
| Siemens | SIMATIC RF360R | <V2.0 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2021-31340 — CVE-2021-31340 · CWE-400
Affected devices do not properly handle large numbers of incoming connections. An attacker may leverage this to cause a Denial-of-Service situation.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting this vulnerability to CISA.
The advisory's legal notice
Siemens Security Advisories are subject to the terms and conditions contained in Siemens' underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens' Global Website (https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.
Sources
DeSpy's copy of this version is dated 2026-09-28.
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