CVSS 3.1
9.1 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HCVE-2021-31889
Critical (9.1) in siemens. EPSS 2.2% chance of exploitation in the next 30 days.
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions < V0.5.0.0). Malformed TCP packets with a corrupted SACK option leads to Information Leaks and Denial-of-Service conditions. (FSMD-2021-0015)
Severity
- EPSS
- 2.2% chance of exploitation in the next 30 days; higher than 82% of CVEs (scores of 2026-10-31)
- CWE
- CWE-191
- Published
- Modified
- Record from
- the NVD, synced
Affected
- siemens:apogee_modular_building_controller_firmware
- siemens:apogee_modular_equiment_controller_firmware
- siemens:apogee_pxc_compact_firmware
- siemens:apogee_pxc_modular_firmware
- siemens:capital_vstar
- siemens:nucleus_net
- siemens:nucleus_readystart_v3
- siemens:nucleus_source_code
- siemens:talon_tc_compact_firmware
- siemens:talon_tc_modular_firmware
References
- https://cert-portal.siemens.com/productcert/html/ssa-044112.html
- https://cert-portal.siemens.com/productcert/html/ssa-114589.html
- https://cert-portal.siemens.com/productcert/html/ssa-223353.html
- https://cert-portal.siemens.com/productcert/html/ssa-620288.html
- https://cert-portal.siemens.com/productcert/html/ssa-845392.html