CVE-2021-21005
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Race Condition Vulnerability in Phoenix Contact FL SWITCH SMCS series products
In Phoenix Contact FL SWITCH SMCS series products in multiple versions if an attacker sends a hand-crafted TCP-Packet with the Urgent-Flag set and the Urgent-Pointer set to 0, the network stack will crash. The device needs to be rebooted afterwards.
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.
FL SWITCH
- Vendor
- Phoenix Contact
- Product
- FL SWITCH
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| SMCS 16TX (2700996) | affected | custom | Unavailable | 4.70 | None listed |
| SMCS 14TX/2FX (2700997) | affected | custom | Unavailable | 4.70 | None listed |
| SMCS 14TX/2FX-SM (2701466) | affected | custom | Unavailable | 4.70 | None listed |
| SMCS 8GT (2891123) | affected | custom | Unavailable | 4.70 | None listed |
| SMCS 6GT/2SFP (2891479) | affected | custom | Unavailable | 4.70 | None listed |
| SMCS 8TX-PN (2989103) | affected | custom | Unavailable | 4.70 | None listed |
| SMCS 4TX-PN (2989093) | affected | custom | Unavailable | 4.70 | None listed |
| SMCS 8TX (2989226) | affected | custom | Unavailable | 4.70 | None listed |
| SMCS 6TX/2SFP (2989323) | affected | custom | Unavailable | 4.70 | None listed |
| SMN 6TX/2POF-PN (2700290) | affected | custom | Unavailable | 4.70 | None listed |
| SMN 8TX-PN (2989501) | affected | custom | Unavailable | 4.70 | None listed |
| SMN 6TX/2FX (2989543) | affected | custom | Unavailable | 4.70 | None listed |
| SMN 6TX/2FX SM (2989556) | affected | custom | Unavailable | 4.70 | None listed |
FL NAT
- Vendor
- Phoenix Contact
- Product
- FL NAT
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| SMN 8TX (2989365) | affected | custom | Unavailable | 4.63 | None listed |
| SMN 8TX-M (2702443) | affected | custom | Unavailable | 4.63 | None listed |