How severe is CVE-2021-31895?

CVE-2021-31895 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-31895 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31895?

CVE-2021-31895 primarily affects Siemens Ruggedcom Ros I800. In total, 52 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-31895?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-31895 published?

CVE-2021-31895 was published on 2021-07-13 and last updated on 2026-06-17.

CVE-2021-31895

CVE-2021-31895 is a high-severity vulnerability in Siemens Ruggedcom Ros I800 with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Siemens Ruggedcom Ros I800
Published: 2021-07-13
Last modified: 2026-06-17

Description

A vulnerability has been identified in RUGGEDCOM i800 (All versions < V4.3.7), RUGGEDCOM i801 (All versions < V4.3.7), RUGGEDCOM i802 (All versions < V4.3.7), RUGGEDCOM i803 (All versions < V4.3.7), RUGGEDCOM M2100 (All versions < V4.3.7), RUGGEDCOM M2200 (All versions < V4.3.7), RUGGEDCOM M969 (All versions < V4.3.7), RUGGEDCOM RMC30 (All versions < V4.3.7), RUGGEDCOM RMC8388 V4.X (All versions < V4.3.7), RUGGEDCOM RMC8388 V5.X (All versions < V5.5.4), RUGGEDCOM RP110 (All versions < V4.3.7), RUGGEDCOM RS1600 (All versions < V4.3.7), RUGGEDCOM RS1600F (All versions < V4.3.7), RUGGEDCOM RS1600T (All versions < V4.3.7), RUGGEDCOM RS400 (All versions < V4.3.7), RUGGEDCOM RS401 (All versions < V4.3.7), RUGGEDCOM RS416 (All versions < V4.3.7), RUGGEDCOM RS416P (All versions < V4.3.7), RUGGEDCOM RS416Pv2 V4.X (All versions < V4.3.7), RUGGEDCOM RS416Pv2 V5.X (All versions < V5.5.4), RUGGEDCOM RS416v2 V4.X (All versions < V4.3.7), RUGGEDCOM RS416v2 V5.X (All versions < 5.5.4), RUGGEDCOM RS8000 (All versions < V4.3.7), RUGGEDCOM RS8000A (All versions < V4.3.7), RUGGEDCOM RS8000H (All versions < V4.3.7), RUGGEDCOM RS8000T (All versions < V4.3.7), RUGGEDCOM RS900 (32M) V4.X (All versions < V4.3.7), RUGGEDCOM RS900 (32M) V5.X (All versions < V5.5.4), RUGGEDCOM RS900G (All versions < V4.3.7), RUGGEDCOM RS900G (32M) V4.X (All versions < V4.3.7), RUGGEDCOM RS900G (32M) V5.X (All versions < V5.5.4), RUGGEDCOM RS900GP (All versions < V4.3.7), RUGGEDCOM RS900L (All versions < V4.3.7), RUGGEDCOM RS900W (All versions < V4.3.7), RUGGEDCOM RS910 (All versions < V4.3.7), RUGGEDCOM RS910L (All versions < V4.3.7), RUGGEDCOM RS910W (All versions < V4.3.7), RUGGEDCOM RS920L (All versions < V4.3.7), RUGGEDCOM RS920W (All versions < V4.3.7), RUGGEDCOM RS930L (All versions < V4.3.7), RUGGEDCOM RS930W (All versions < V4.3.7), RUGGEDCOM RS940G (All versions < V4.3.7), RUGGEDCOM RS969 (All versions < V4.3.7), RUGGEDCOM RSG2100 (All versions < V4.3.7), RUGGEDCOM RSG2100 (32M) V4.X (All versions < V4.3.7), RUGGEDCOM RSG2100 (32M) V5.X (All versions < V5.5.4), RUGGEDCOM RSG2100P (All versions < V4.3.7), RUGGEDCOM RSG2100P (32M) V4.X (All versions < V4.3.7), RUGGEDCOM RSG2100P (32M) V5.X (All versions < V5.5.4), RUGGEDCOM RSG2200 (All versions < V4.3.7), RUGGEDCOM RSG2288 V4.X (All versions < V4.3.7), RUGGEDCOM RSG2288 V5.X (All versions < V5.5.4), RUGGEDCOM RSG2300 V4.X (All versions < V4.3.7), RUGGEDCOM RSG2300 V5.X (All versions < V5.5.4), RUGGEDCOM RSG2300P V4.X (All versions < V4.3.7), RUGGEDCOM RSG2300P V5.X (All versions < V5.5.4), RUGGEDCOM RSG2488 V4.X (All versions < V4.3.7), RUGGEDCOM RSG2488 V5.X (All versions < V5.5.4), RUGGEDCOM RSG907R (All versions < V5.5.4), RUGGEDCOM RSG908C (All versions < V5.5.4), RUGGEDCOM RSG909R (All versions < V5.5.4), RUGGEDCOM RSG910C (All versions < V5.5.4), RUGGEDCOM RSG920P V4.X (All versions < V4.3.7), RUGGEDCOM RSG920P V5.X (All versions < V5.5.4), RUGGEDCOM RSL910 (All versions < V5.5.4), RUGGEDCOM RST2228 (All versions < V5.5.4), RUGGEDCOM RST2228P (All versions < V5.5.4), RUGGEDCOM RST916C (All versions < V5.5.4), RUGGEDCOM RST916P (All versions < V5.5.4). The DHCP client in affected devices fails to properly sanitize incoming DHCP packets. This could allow an unauthenticated remote attacker to cause memory to be overwritten, potentially allowing remote code execution.

Frequently asked questions

What is CVE-2021-31895?: A vulnerability has been identified in RUGGEDCOM i800 (All versions < V4.3.7), RUGGEDCOM i801 (All versions < V4.3.7), RUGGEDCOM i802 (All versions < V4.3.7), RUGGEDCOM i803 (All versions < V4.3.7), RUGGEDCOM M2100 (All versions < V4.3.7), RUGGEDCOM M2200 (All versions < V4.3.7), RUGGEDCOM M969 (All versions < V4.3.7), RUGGEDCOM RMC30 (All versions < V4.3.7), RUGGEDCOM RMC8388 V4.X (All versions < V4.3.7), RUGGEDCOM RMC8388 V5.X (All versions < V5.5.4), RUGGEDCOM RP110 (All versions < V4.3.7), RUGGEDCOM RS1600 (All versions < V4.3.7), RUGGEDCOM RS1600F (All versions < V4.3.7), RUGGEDCOM RS1600T (All versions < V4.3.7), RUGGEDCOM RS400 (All versions < V4.3.7), RUGGEDCOM RS401 (All versions < V4.3.7), RUGGEDCOM RS416 (All versions < V4.3.7), RUGGEDCOM RS416P (All versions < V4.3.7), RUGGEDCOM RS416Pv2 V4.X (All versions < V4.3.7), RUGGEDCOM RS416Pv2 V5.X (All versions < V5.5.4), RUGGEDCOM RS416v2 V4.X (All versions < V4.3.7), RUGGEDCOM RS416v2 V5.X (All versions < 5.5.4), RUGGEDCOM RS8000 (All versions < V4.3.7), RUGGEDCOM RS8000A (All versions < V4.3.7), RUGGEDCOM RS8000H (All versions < V4.3.7), RUGGEDCOM RS8000T (All versions < V4.3.7), RUGGEDCOM RS900 (32M) V4.X (All versions < V4.3.7), RUGGEDCOM RS900 (32M) V5.X (All versions < V5.5.4), RUGGEDCOM RS900G (All versions < V4.3.7), RUGGEDCOM RS900G (32M) V4.X (All versions < V4.3.7), RUGGEDCOM RS900G (32M) V5.X (All versions < V5.5.4), RUGGEDCOM RS900GP (All versions < V4.3.7), RUGGEDCOM RS900L (All versions < V4.3.7), RUGGEDCOM RS900W (All versions < V4.3.7), RUGGEDCOM RS910 (All versions < V4.3.7), RUGGEDCOM RS910L (All versions < V4.3.7), RUGGEDCOM RS910W (All versions < V4.3.7), RUGGEDCOM RS920L (All versions < V4.3.7), RUGGEDCOM RS920W (All versions < V4.3.7), RUGGEDCOM RS930L (All versions < V4.3.7), RUGGEDCOM RS930W (All versions < V4.3.7), RUGGEDCOM RS940G (All versions < V4.3.7), RUGGEDCOM RS969 (All versions < V4.3.7), RUGGEDCOM RSG2100 (All versions < V4.3.7), RUGGEDCOM RSG2100 (32M) V4.X (All versions < V4.3.7), RUGGEDCOM RSG2100 (32M) V5.X (All versions < V5.5.4), RUGGEDCOM RSG2100P (All versions < V4.3.7), RUGGEDCOM RSG2100P (32M) V4.X (All versions < V4.3.7), RUGGEDCOM RSG2100P (32M) V5.X (All versions < V5.5.4), RUGGEDCOM RSG2200 (All versions < V4.3.7), RUGGEDCOM RSG2288 V4.X (All versions < V4.3.7), RUGGEDCOM RSG2288 V5.X (All versions < V5.5.4), RUGGEDCOM RSG2300 V4.X (All versions < V4.3.7), RUGGEDCOM RSG2300 V5.X (All versions < V5.5.4), RUGGEDCOM RSG2300P V4.X (All versions < V4.3.7), RUGGEDCOM RSG2300P V5.X (All versions < V5.5.4), RUGGEDCOM RSG2488 V4.X (All versions < V4.3.7), RUGGEDCOM RSG2488 V5.X (All versions < V5.5.4), RUGGEDCOM RSG907R (All versions < V5.5.4), RUGGEDCOM RSG908C (All versions < V5.5.4), RUGGEDCOM RSG909R (All versions < V5.5.4), RUGGEDCOM RSG910C (All versions < V5.5.4), RUGGEDCOM RSG920P V4.X (All versions < V4.3.7), RUGGEDCOM RSG920P V5.X (All versions < V5.5.4), RUGGEDCOM RSL910 (All versions < V5.5.4), RUGGEDCOM RST2228 (All versions < V5.5.4), RUGGEDCOM RST2228P (All versions < V5.5.4), RUGGEDCOM RST916C (All versions < V5.5.4), RUGGEDCOM RST916P (All versions < V5.5.4). The DHCP client in affected devices fails to properly sanitize incoming DHCP packets. This could allow an unauthenticated remote attacker to cause memory to be overwritten, potentially allowing remote code execution.
How severe is CVE-2021-31895?: CVE-2021-31895 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-31895 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31895?: CVE-2021-31895 primarily affects Siemens Ruggedcom Ros I800. In total, 52 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-31895?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-31895 published?: CVE-2021-31895 was published on 2021-07-13 and last updated on 2026-06-17.

References

Affected products (52)

cpe:2.3:o:siemens:ruggedcom_ros_i800:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_i801:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_i802:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_i803:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_m969:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_m2100:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_m2200:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rmc:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rmc20:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rmc30:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rmc40:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rmc41:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rmc8388:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rp110:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs400:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs401:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs416:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs416v2:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs900:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs900g:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs900gp:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs900l:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs900w:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs910:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs910l:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs910w:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs920l:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs920w:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs930l:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs930w:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs940g:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs969:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs8000:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs8000a:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs8000h:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rs8000t:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rsg900:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rsg900c:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rsg900g:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_ros_rsg900r:*:*:*:*:*:*:*:*

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