CVE-2015-3971

The debug interface on Janitza UMG 508, 509, 511, 604, and 605 devices does not require authentication, which allows remote attackers to read or write to files, or execute arbitrary JASIC code, via a session on TCP port 1239.

Published: 2015-10-28 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-3971 is rated Moderate Risk (56.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.62%). EPSS rose +1.26% 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-2015-3971

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 0.36% 1.62% +1.26%
2 2026-02-03 0.35% 0.36% +0.01%
3 2025-03-17 — 0.35% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-3971

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P 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:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2015-3971

Affected software / configurations for CVE-2015-3971

Vendor Product Version Raw CPE
janitza umg_508 — cpe:2.3:h:janitza:umg_508:-:*:*:*:*:*:*:*
janitza umg_509 — cpe:2.3:h:janitza:umg_509:-:*:*:*:*:*:*:*
janitza umg_511 — cpe:2.3:h:janitza:umg_511:-:*:*:*:*:*:*:*
janitza umg_604 — cpe:2.3:h:janitza:umg_604:-:*:*:*:*:*:*:*
janitza umg_605 — cpe:2.3:h:janitza:umg_605:-:*:*:*:*:*:*:*

References for CVE-2015-3971

URL Tags
https://ics-cert.us-cert.gov/advisories/ICSA-15-265-03 Patch Third Party Advisory US Government Resource
cvelogic Threat Intelligence