CVE-2018-5434 | XML eXternal Entity Expansion Vulnerabilities with TIBCO Runtime Agent

The TIBCO Designer component of TIBCO Software Inc.'s TIBCO Runtime Agent, and TIBCO Runtime Agent for z/Linux contains vulnerabilities wherein a malicious user could perform XML external entity expansion (XXE) attacks to disclose host machine information. Affected releases are TIBCO Software Inc.'s TIBCO Runtime Agent: versions up to and including 5.10.0, and TIBCO Runtime Agent for z/Linux: versions up to and including 5.9.1.

Published: 2018-06-13 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-5434 is rated Moderate Risk (47/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.23%). EPSS rose +1.00% 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-2018-5434

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 0.23% 1.23% +1.00%
2 2025-05-14 0.32% 0.23% -0.08%
3 2025-03-30 — 0.32% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-5434

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.8 3.0 MEDIUM
CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
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.
 1.3 4.0 [email protected]
6.5 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/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:L)
A normal user session is enough; they don’t have to be admin.
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.
 2.8 3.6 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:L/Au:S/C:C/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:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.0 6.9 [email protected]

Weakness enumeration for CVE-2018-5434

Affected software / configurations for CVE-2018-5434

Vendor Product Version Raw CPE
tibco runtime_agent <= 5.9.1 cpe:2.3:a:tibco:runtime_agent:*:*:*:*:*:linux_kernel:*:*
tibco runtime_agent <= 5.10.0 cpe:2.3:a:tibco:runtime_agent:*:*:*:*:*:*:*:*

References for CVE-2018-5434

cvelogic Threat Intelligence