CVE-2021-25677
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 1.1%
exploitation probability
1.1%top 39% of all CVEs
observed exploitation
nono source reports it
A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), SIMOTICS CONNECT 400 (All versions >= V0.5.0.0 < V1.0.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS client does not properly randomize DNS transaction IDs. That could allow an attacker to poison the DNS cache or spoof DNS resolving.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
Affected products
Siemens · APOGEE PXC Compact (BACnet)Siemens · APOGEE PXC Compact (P2 Ethernet)Siemens · APOGEE PXC Modular (BACnet)Siemens · APOGEE PXC Modular (P2 Ethernet)Siemens · Nucleus NETSiemens · Nucleus ReadyStart V3Siemens · Nucleus ReadyStart V4Siemens · Nucleus Source CodeSiemens · SIMOTICS CONNECT 400Siemens · TALON TC Compact (BACnet)Siemens · TALON TC Modular (BACnet)