OpENer v2.3/ commit 76b95cf, contains an out-of-bounds read in the server-side EtherNet/IP ForwardOpen connection-path parser. This allows a remtoe attacker to cause a denial of service
CVE-2026-75353
UNRATEDCVSS · not yet scoredTrending — 4 sources updated this week
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS v2: —Exploit: None knownExposed services: Not assessed
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
- CVSS v3
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- EchelonGraph score
- Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
- EG Score
- —
- EG Risk
- —
- EPSS PROB
- 0.1%
- EPSS %ILE
- 3rd
- KEV
- Not listed
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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 9, 2026
References (2)
Vendor Advisories for CVE-2026-75353(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Data Freshness Timeline
(refreshed 11× in last 7d / 11× 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.
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-12 15:39 UTCEG score recompute
- 2026-10-11 19:25 UTCEG score recompute
- 2026-10-11 16:40 UTCEG score recompute
- 2026-10-11 13:59 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-09 19:34 UTCNVD update
- 2026-10-09 18:38 UTCEG score recompute
- 2026-10-09 18:38 UTCMITRE cvelistV5first tracked
Frequently asked(4)
What is CVE-2026-75353?
CVE-2026-75353 is a vulnerability whose severity is not yet rated; its CVE record was published on October 9, 2026. OpENer v2.3/ commit 76b95cf, contains an out-of-bounds read in the server-side EtherNet/IP ForwardOpen connection-path parser. This allows a remtoe attacker to cause a denial of service
When was the CVE record for CVE-2026-75353 published?
The CVE record for CVE-2026-75353 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 9, 2026; the record at its source may have been updated since.
Is CVE-2026-75353 actively exploited?
CVE-2026-75353 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-75353?
No fix for CVE-2026-75353 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-2026-75353 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-75353
Is Your Infrastructure Affected by CVE-2026-75353?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.