A weakness has been identified in liftoff-sr CIPster 1802525be27d33e19a9a83c163e331a1d13b1892. This affects the function CipConnMgrClass::forward_open of the file cipconnectionmanager.cc of the component ForwardOpen Handler. Executing a manipulation of the argument product_code_ can lead to out-of-bounds read. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. This patch is called ea870a274bf68dfaa3f511f20e2fff6778fb7b74. A patch should be applied to remediate this issue.
CVE-2026-76988
MEDIUMPre-NVD 5.35.3—Trending — 4 sources updated this weekElevated
EchelonGraph scoreHIGH confidence
Score 5.3 from GitHub Security Advisory published 2026-08-20. a secondary CVSS source baseline 5.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 5.3Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(high)
- EG Risk
- 39(Attend)EG Risk 39/100SSVC: Attend
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 computedSeverity53% × 45%Exploitation0% × 40%Automatability100% × 15%Action: Remediate soon — notable exploitation risk. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
August 20, 2026
Last Modified
August 20, 2026
Advisory Details (3)
Auto-updated Aug 20, 2026Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic
GitHub - liftoff-sr/CIPster: Ethernet/IP (Common Industrial Protocol) stack in C++. This started as a C to C++ conversion of C based OpENer. · GitHub
https://github.com/liftoff-sr/CIPster/github_commit
commit ea870a274bf6 (liftoff-sr/CIPster)
Fix landed in liftoff-sr/CIPster commit ea870a274bf6 — awaiting tagged release
https://github.com/liftoff-sr/CIPster/commit/ea870a274bf68dfaa3f511f20e2fff6778fb7b74generic
ForwardOpen mixed-class application path causes type confusion in `ConnectionData::CorrectSizes()` and triggers remote `out-of-bounds read` · Issue #45 · liftoff-sr/CIPster · GitHub
https://github.com/liftoff-sr/CIPster/issues/45Vendor Advisories for CVE-2026-76988(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 10× 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.
- 2026-08-20 17:34 UTCEG score recompute
- 2026-08-20 17:34 UTCGHSA enrichment
- 2026-08-20 17:33 UTCNVD updateCVSS v4 → 5.5
- 2026-08-20 17:07 UTCEG score recompute
- 2026-08-20 17:07 UTCGHSA enrichment
- 2026-08-20 17:07 UTCMITRE cvelistV5CVSS v4 → 6.9
- 2026-08-20 13:23 UTCEG score recompute
- 2026-08-20 13:22 UTCNVD updateCVSS v4 → 5.5
- 2026-08-20 13:08 UTCEG score recompute
- 2026-08-20 13:06 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-119
- CVE-2003-0819EG 10.0EPSS p99HIGH
- CVE-2003-0903EG 10.0EPSS p98HIGH
- CVE-2003-1339EG 10.0EPSS p99HIGH
- CVE-2003-0095EG 10.0EPSS p96HIGH
- CVE-2002-2227EG 10.0HIGH
- CVE-2002-2248EG 10.0EPSS p93HIGH
- CVE-2002-2250EG 10.0EPSS p94HIGH
- CVE-2002-2251EG 10.0EPSS p93HIGH
- CVE-2002-2253EG 10.0EPSS p93HIGH
- CVE-2002-2257EG 10.0EPSS p92HIGH
Frequently asked(4)
What is CVE-2026-76988?
CVE-2026-76988 is a medium vulnerability published on August 20, 2026. A weakness has been identified in liftoff-sr CIPster 1802525be27d33e19a9a83c163e331a1d13b1892. This affects the function CipConnMgrClass::forwardopen of the file cipconnectionmanager.cc of the component ForwardOpen Handler. Executing a manipulation of the argument productcode_ can lead to…
When was CVE-2026-76988 disclosed?
CVE-2026-76988 was first published in the National Vulnerability Database on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-76988?
CVE-2026-76988 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-76988?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76988, 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-2026-76988
Is Your Infrastructure Affected by CVE-2026-76988?
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