CVE-2026-75345

HIGHPre-NVD 7.57.5
EchelonGraph scoreHIGH confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-10-09. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

OpENer v2.3.0 / commit 76b95cf contains an out-of-bounds read in the unconnected explicit messaging path. This allows a remote attacker to cause a denial of service.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
65
EG Risk 65/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 9, 2026

Last Modified

October 13, 2026

Advisory Details (6)

Auto-updated Oct 9, 2026
No fix on record yet.
Web page

OpENer/source/src/enet_encap/endianconv.c at 76b95cf951a18d0e8481833168ab8c6943ce7c96 · EIPStackGroup/OpENer · GitHub

https://github.com/EIPStackGroup/OpENer/blob/76b95cf/source/src/enet_encap/endianconv.c
Web page

OpENer/source/src/cip/ciptcpipinterface.c at 76b95cf951a18d0e8481833168ab8c6943ce7c96 · EIPStackGroup/OpENer · GitHub

https://github.com/EIPStackGroup/OpENer/blob/76b95cf/source/src/cip/ciptcpipinterface.c
Web page

OpENer/source/src/cip/cipcommon.c at 76b95cf951a18d0e8481833168ab8c6943ce7c96 · EIPStackGroup/OpENer · GitHub

https://github.com/EIPStackGroup/OpENer/blob/76b95cf/source/src/cip/cipcommon.c
Web page

OpENer/source/src/cip/cipmessagerouter.c at 76b95cf951a18d0e8481833168ab8c6943ce7c96 · EIPStackGroup/OpENer · GitHub

https://github.com/EIPStackGroup/OpENer/blob/76b95cf/source/src/cip/cipmessagerouter.c
Web page

GitHub - EIPStackGroup/OpENer at 76b95cf951a18d0e8481833168ab8c6943ce7c96 · GitHub

https://github.com/EIPStackGroup/OpENer/tree/76b95cf
Web page

Remote stack-buffer-overflow read in default `SendRRData` / `SetAttributeSingle` path via overlong but decodable Padded EPath reaching real attribute decoders · Issue #569 · EIPStackGroup/OpENer · GitHub

https://github.com/EIPStackGroup/OpENer/issues/569

Vendor Advisories for CVE-2026-75345(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 23× in last 7d / 23× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-13 17:27 UTCEG score recompute
  2. 2026-10-13 17:27 UTCGHSA enrichmentGHSA-4pjq-xq9p-gvj5 · GitHub severity HIGH · GitHub CVSS 7.5
  3. 2026-10-13 16:40 UTCEG score recompute
  4. 2026-10-13 16:39 UTCGHSA enrichmentGHSA-4pjq-xq9p-gvj5 · GitHub severity HIGH · GitHub CVSS 7.5
  5. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  6. 2026-10-13 07:22 UTCEG score recompute
  7. 2026-10-13 07:21 UTCGHSA enrichmentGHSA-4pjq-xq9p-gvj5 · GitHub severity HIGH · GitHub CVSS 7.5
  8. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  9. 2026-10-12 15:39 UTCEG score recompute
  10. 2026-10-11 19:25 UTCEG score recompute
  11. 2026-10-11 18:37 UTCGHSA enrichmentGHSA-4pjq-xq9p-gvj5 · GitHub severity HIGH · GitHub CVSS 7.5
  12. 2026-10-11 16:40 UTCEG score recompute
  13. 2026-10-11 13:59 UTCEG score recompute
  14. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-10-11 06:16 UTCEG score recompute
  16. 2026-10-11 06:15 UTCGHSA enrichmentGHSA-4pjq-xq9p-gvj5 · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  18. 2026-10-10 17:54 UTCGHSA enrichmentGHSA-4pjq-xq9p-gvj5 · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-10-10 05:34 UTCEG score recompute
  20. 2026-10-10 05:34 UTCGHSA enrichmentGHSA-4pjq-xq9p-gvj5 · GitHub severity HIGH · GitHub CVSS 7.5
  21. 2026-10-09 16:34 UTCEG score recompute
  22. 2026-10-09 15:48 UTCEG score recomputeFirst assessed: 7.5 HIGH
  23. 2026-10-09 15:48 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-75345?
CVE-2026-75345 is a high-severity vulnerability; its CVE record was published on October 9, 2026. OpENer v2.3.0 / commit 76b95cf contains an out-of-bounds read in the unconnected explicit messaging path. This allows a remote attacker to cause a denial of service.
When was the CVE record for CVE-2026-75345 published?
The CVE record for CVE-2026-75345 was published on October 9, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 13, 2026; the record at its source may have been updated since.
Is CVE-2026-75345 actively exploited?
CVE-2026-75345 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75345?
CVE-2026-75345 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75345?
No fix for CVE-2026-75345 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-75345 are linked in the Vendor Advisories panel on this page.

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