CVE-2020-14483

A timeout during a TLS handshake can result in the connection failing to terminate. This can result in a Niagara thread hanging and requires a manual restart of Niagara (Versions 4.6.96.28, 4.7.109.20, 4.7.110.32, 4.8.0.110) and Niagara Enterprise Security (Versions 2.4.31, 2.4.45, 4.8.0.35) to correct.

Published: 2020-08-13 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-14483 is rated Low Risk (29.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.42%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2020-14483

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 0.06% 0.42% +0.36%
2 2023-04-29 0.05% 0.06% +0.01%
3 2023-03-07 — 0.05% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-14483

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 1.4 [email protected]
3.3 2.0 LOW
AV:A/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.5 2.9 [email protected]

Weakness enumeration for CVE-2020-14483

Affected software / configurations for CVE-2020-14483

Vendor Product Version Raw CPE
tridium niagara 4.6.96.28 cpe:2.3:a:tridium:niagara:4.6.96.28:*:*:*:*:*:*:*
tridium niagara 4.7.109.20 cpe:2.3:a:tridium:niagara:4.7.109.20:*:*:*:*:*:*:*
tridium niagara 4.7.110.32 cpe:2.3:a:tridium:niagara:4.7.110.32:*:*:*:*:*:*:*
tridium niagara 4.8.0.110 cpe:2.3:a:tridium:niagara:4.8.0.110:*:*:*:*:*:*:*
tridium niagara_enterprise_security 2.4.31 cpe:2.3:a:tridium:niagara_enterprise_security:2.4.31:*:*:*:*:*:*:*
tridium niagara_enterprise_security 2.4.45 cpe:2.3:a:tridium:niagara_enterprise_security:2.4.45:*:*:*:*:*:*:*
tridium niagara_enterprise_security 4.8.0.35 cpe:2.3:a:tridium:niagara_enterprise_security:4.8.0.35:*:*:*:*:*:*:*

References for CVE-2020-14483

URL Tags
https://us-cert.cisa.gov/ics/advisories/icsa-20-224-03 Third Party Advisory US Government Resource
cvelogic Threat Intelligence