CVE-2016-5816

A Use of Hard-Coded Cryptographic Key issue was discovered in MRD-305-DIN versions older than 1.7.5.0, and MRD-315, MRD-355, MRD-455 versions older than 1.7.5.0. The device utilizes hard-coded private cryptographic keys that may allow an attacker to decrypt traffic from any other source.

Published: 2017-08-25 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-5816 is rated Moderate Risk (56.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.53%). EPSS rose +1.34% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-5816

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.19% 1.53% +1.34%
2 2025-03-30 0.39% 0.19% -0.20%
3 2025-03-29 — 0.39% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-5816

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-5816

Affected software / configurations for CVE-2016-5816

Vendor Product Version Raw CPE
westermo mrd-305-din_firmware — cpe:2.3:o:westermo:mrd-305-din_firmware:-:*:*:*:*:*:*:*
westermo mrd-315-din_firmware — cpe:2.3:o:westermo:mrd-315-din_firmware:-:*:*:*:*:*:*:*
westermo mrd-355-din_firmware — cpe:2.3:o:westermo:mrd-355-din_firmware:-:*:*:*:*:*:*:*
westermo mrd-455-din_firmware — cpe:2.3:o:westermo:mrd-455-din_firmware:-:*:*:*:*:*:*:*

References for CVE-2016-5816

URL Tags
https://ics-cert.us-cert.gov/advisories/ICSA-17-236-01 Third Party Advisory US Government Resource
cvelogic Threat Intelligence