CVE-2021-31340

CVE.org · Published

Record status: Published
Identifier year (not publication year): 2021
Source publication: Jun 8, 2021
Source updated: Aug 3, 2024
Imported by cveboard: Oct 24, 2026
Source snapshot: cve_2026-10-24_midnight_baseline · Oct 24, 2026

CNA source text (English)

A vulnerability has been identified in SIMATIC RF166C (All versions > V1.1 and < V1.3.2), SIMATIC RF185C (All versions > V1.1 and < V1.3.2), SIMATIC RF186C (All versions > V1.1 and < V1.3.2), SIMATIC RF186CI (All versions > V1.1 and < V1.3.2), SIMATIC RF188C (All versions > V1.1 and < V1.3.2), SIMATIC RF188CI (All versions > V1.1 and < V1.3.2), SIMATIC RF360R (All versions < V2.0), SIMATIC Reader RF610R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF610R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF610R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF615R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF615R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF615R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF650R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF650R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF650R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF650R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF680R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF680R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF680R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF680R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF685R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF685R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF685R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF685R FCC (All versions > V3.0 < V4.0). Affected devices do not properly handle large numbers of incoming connections. An attacker may leverage this to cause a Denial-of-Service situation.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

SIMATIC RF166C

Vendor: Siemens
Product: SIMATIC RF166C
Platforms: Unknown
Default status: Unknown

SIMATIC RF166C · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V1.1 and < V1.3.2	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC RF185C

Vendor: Siemens
Product: SIMATIC RF185C
Platforms: Unknown
Default status: Unknown

SIMATIC RF185C · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V1.1 and < V1.3.2	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC RF186C

Vendor: Siemens
Product: SIMATIC RF186C
Platforms: Unknown
Default status: Unknown

SIMATIC RF186C · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V1.1 and < V1.3.2	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC RF186CI

Vendor: Siemens
Product: SIMATIC RF186CI
Platforms: Unknown
Default status: Unknown

SIMATIC RF186CI · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V1.1 and < V1.3.2	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC RF188C

Vendor: Siemens
Product: SIMATIC RF188C
Platforms: Unknown
Default status: Unknown

SIMATIC RF188C · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V1.1 and < V1.3.2	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC RF188CI

Vendor: Siemens
Product: SIMATIC RF188CI
Platforms: Unknown
Default status: Unknown

SIMATIC RF188CI · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V1.1 and < V1.3.2	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC RF360R

Vendor: Siemens
Product: SIMATIC RF360R
Platforms: Unknown
Default status: Unknown

SIMATIC RF360R · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions < V2.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF610R CMIIT

Vendor: Siemens
Product: SIMATIC Reader RF610R CMIIT
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF610R CMIIT · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF610R ETSI

Vendor: Siemens
Product: SIMATIC Reader RF610R ETSI
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF610R ETSI · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF610R FCC

Vendor: Siemens
Product: SIMATIC Reader RF610R FCC
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF610R FCC · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF615R CMIIT

Vendor: Siemens
Product: SIMATIC Reader RF615R CMIIT
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF615R CMIIT · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF615R ETSI

Vendor: Siemens
Product: SIMATIC Reader RF615R ETSI
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF615R ETSI · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF615R FCC

Vendor: Siemens
Product: SIMATIC Reader RF615R FCC
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF615R FCC · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF650R ARIB

Vendor: Siemens
Product: SIMATIC Reader RF650R ARIB
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF650R ARIB · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF650R CMIIT

Vendor: Siemens
Product: SIMATIC Reader RF650R CMIIT
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF650R CMIIT · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF650R ETSI

Vendor: Siemens
Product: SIMATIC Reader RF650R ETSI
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF650R ETSI · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF650R FCC

Vendor: Siemens
Product: SIMATIC Reader RF650R FCC
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF650R FCC · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF680R ARIB

Vendor: Siemens
Product: SIMATIC Reader RF680R ARIB
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF680R ARIB · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF680R CMIIT

Vendor: Siemens
Product: SIMATIC Reader RF680R CMIIT
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF680R CMIIT · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF680R ETSI

Vendor: Siemens
Product: SIMATIC Reader RF680R ETSI
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF680R ETSI · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF680R FCC

Vendor: Siemens
Product: SIMATIC Reader RF680R FCC
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF680R FCC · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF685R ARIB

Vendor: Siemens
Product: SIMATIC Reader RF685R ARIB
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF685R ARIB · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF685R CMIIT

Vendor: Siemens
Product: SIMATIC Reader RF685R CMIIT
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF685R CMIIT · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF685R ETSI

Vendor: Siemens
Product: SIMATIC Reader RF685R ETSI
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF685R ETSI · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed

SIMATIC Reader RF685R FCC

Vendor: Siemens
Product: SIMATIC Reader RF685R FCC
Platforms: Unknown
Default status: Unknown

SIMATIC Reader RF685R FCC · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
All versions > V3.0 < V4.0	`affected`	Unavailable	Unavailable	Unavailable	None listed