A security issue exists within Arena® Simulation due to a memory corruption vulnerability in the siman.exe (Siman) component. The vulnerability stems from improper validation of user-supplied data, which can result in an out-of-bounds write. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process by convincing a user to open a malicious file.
CVE-2026-8314
HIGHNVD 7.37.3Trending — 5 sources updated this week
EchelonGraph scoreLOW confidence
This high-severity CVE scores 7.3 under NVD CVSS v3. EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: nvd
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.3
- EG Score
- 7.3(low)
- EPSS
- 1.8%
- KEV
- Not listed
Published
July 14, 2026
Last Modified
July 15, 2026
Advisory Details (1)
Auto-updated Jul 14, 2026No patch confirmed yet.
generic
SD1784 | Security Advisory | Rockwell Automation | US
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1784.htmlVendor Advisories for CVE-2026-8314(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 8× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 14:48 UTCEG score recompute▲ 0.30
- 2026-07-15 14:48 UTCGHSA enrichment
- 2026-07-15 14:22 UTCNVD updateCVSS v3 → 7.3
- 2026-07-15 01:59 UTCEG score recompute
- 2026-07-15 01:59 UTCGHSA enrichment
- 2026-07-14 13:11 UTCEG score recompute
- 2026-07-14 13:11 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-8314?
CVE-2026-8314 is a high vulnerability published on July 14, 2026. A security issue exists within Arena® Simulation due to a memory corruption vulnerability in the siman.exe (Siman) component. The vulnerability stems from improper validation of user-supplied data, which can result in an out-of-bounds write. An attacker could leverage this vulnerability to execute…
When was CVE-2026-8314 disclosed?
CVE-2026-8314 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8314 actively exploited?
CVE-2026-8314 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8314?
CVE-2026-8314 has a CVSS v3 base score of 7.3 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-8314?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8314, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-8314
Is Your Infrastructure Affected by CVE-2026-8314?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.