CVE-2026-76987

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2026-08-20. A secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.3EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.3Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

A security flaw has been discovered in liftoff-sr CIPster 1802525be27d33e19a9a83c163e331a1d13b1892. The impacted element is the function CipAttribute::GetAttrData/CipAttribute::SetAttrData of the file ciptypes.h of the component Generic Attribute Logic. Performing a manipulation results in memory corruption. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks. The patch is named e745d9d4a8ca3a13689066983a1269fe1e567674. It is suggested to install a patch to address this issue.

CVSS v3
7.3
EG Score
7.3HIGHmedium confidence
EG Risk
38
EG Risk 38/100CISA SSVC

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
Severity73% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. 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 until it ships, then apply the release.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. 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 until it ships, then apply the release.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 20, 2026

Last Modified

August 24, 2026

Advisory Details (3)

Auto-updated Aug 20, 2026
Upstream 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 e745d9d4a8ca (liftoff-sr/CIPster)

Fix landed in liftoff-sr/CIPster commit e745d9d4a8ca — awaiting tagged release

https://github.com/liftoff-sr/CIPster/commit/e745d9d4a8ca3a13689066983a1269fe1e567674
generic

Writable `kCipByteArrayLength` can poison shared `ByteBuf` metadata and trigger out-of-bounds read/write in generic `Get/SetAttributeSingle` paths · Issue #47 · liftoff-sr/CIPster · GitHub

https://github.com/liftoff-sr/CIPster/issues/47

Vendor Advisories for CVE-2026-76987(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 22× in last 7d / 100× 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.

Showing the most recent 100 of 165 total refreshes for this CVE.

  1. 2026-10-05 10:05 UTCEG score recompute
  2. 2026-10-05 10:05 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 21:17 UTCGHSA enrichment
  5. 2026-10-04 05:36 UTCGHSA enrichment
  6. 2026-10-03 16:49 UTCEG score recompute
  7. 2026-10-03 16:49 UTCGHSA enrichment
  8. 2026-10-03 14:26 UTCEPSS rescore
  9. 2026-10-03 01:43 UTCEG score recompute
  10. 2026-10-03 01:43 UTCGHSA enrichment
  11. 2026-10-02 12:55 UTCGHSA enrichment
  12. 2026-10-01 22:44 UTCEG score recompute
  13. 2026-10-01 22:44 UTCGHSA enrichment
  14. 2026-10-01 19:50 UTCEPSS rescore
  15. 2026-10-01 09:56 UTCGHSA enrichment
  16. 2026-09-30 21:09 UTCEG score recompute
  17. 2026-09-30 21:09 UTCGHSA enrichment
  18. 2026-09-30 08:22 UTCEG score recompute
  19. 2026-09-30 08:22 UTCGHSA enrichment
  20. 2026-09-29 15:24 UTCEPSS rescore
  21. 2026-09-28 21:39 UTCEG score recompute
  22. 2026-09-28 21:39 UTCGHSA enrichment
  23. 2026-09-28 13:52 UTCEPSS rescore
  24. 2026-09-28 04:56 UTCGHSA enrichment
  25. 2026-09-27 16:09 UTCEG score recompute
Show 75 more
  1. 2026-09-27 16:08 UTCGHSA enrichment
  2. 2026-09-27 13:48 UTCEPSS rescore
  3. 2026-09-27 03:21 UTCEG score recompute
  4. 2026-09-27 03:21 UTCGHSA enrichment
  5. 2026-09-26 15:59 UTCEPSS rescore
  6. 2026-09-26 00:28 UTCEPSS rescore
  7. 2026-09-25 04:28 UTCGHSA enrichment
  8. 2026-09-24 15:40 UTCEG score recompute
  9. 2026-09-24 15:40 UTCGHSA enrichment
  10. 2026-09-24 14:04 UTCEPSS rescore
  11. 2026-09-24 02:41 UTCEG score recompute
  12. 2026-09-24 02:41 UTCGHSA enrichment
  13. 2026-09-23 17:54 UTCEPSS rescore
  14. 2026-09-23 13:54 UTCGHSA enrichment
  15. 2026-09-23 01:06 UTCEG score recompute
  16. 2026-09-23 01:06 UTCGHSA enrichment
  17. 2026-09-22 16:01 UTCEPSS rescore
  18. 2026-09-22 12:18 UTCGHSA enrichment
  19. 2026-09-21 23:25 UTCEG score recompute
  20. 2026-09-21 23:24 UTCGHSA enrichment
  21. 2026-09-21 21:09 UTCEPSS rescore
  22. 2026-09-21 10:37 UTCGHSA enrichment
  23. 2026-09-20 21:50 UTCEG score recompute
  24. 2026-09-20 21:50 UTCGHSA enrichment
  25. 2026-09-20 20:16 UTCEPSS rescore
  26. 2026-09-20 09:02 UTCGHSA enrichment
  27. 2026-09-19 19:27 UTCEG score recompute
  28. 2026-09-19 19:27 UTCGHSA enrichment
  29. 2026-09-19 06:39 UTCEG score recompute
  30. 2026-09-19 06:39 UTCGHSA enrichment
  31. 2026-09-18 19:28 UTCEPSS rescore
  32. 2026-09-18 17:51 UTCGHSA enrichment
  33. 2026-09-18 05:04 UTCEG score recompute
  34. 2026-09-18 05:04 UTCGHSA enrichment
  35. 2026-09-17 16:16 UTCGHSA enrichment
  36. 2026-09-17 03:29 UTCGHSA enrichment
  37. 2026-09-16 14:31 UTCEG score recompute
  38. 2026-09-16 14:30 UTCGHSA enrichment
  39. 2026-09-16 14:08 UTCEPSS rescore
  40. 2026-09-16 05:15 UTCEPSS rescore
  41. 2026-09-16 01:32 UTCGHSA enrichment
  42. 2026-09-15 12:44 UTCEG score recompute
  43. 2026-09-15 12:44 UTCGHSA enrichment
  44. 2026-09-15 03:12 UTCEPSS rescore
  45. 2026-09-14 23:49 UTCGHSA enrichment
  46. 2026-09-14 10:12 UTCGHSA enrichment
  47. 2026-09-13 21:25 UTCEG score recompute
  48. 2026-09-13 21:25 UTCGHSA enrichment
  49. 2026-09-13 08:37 UTCGHSA enrichment
  50. 2026-09-12 19:49 UTCEG score recompute
  51. 2026-09-12 19:49 UTCGHSA enrichment
  52. 2026-09-12 15:02 UTCEPSS rescore
  53. 2026-09-12 07:01 UTCGHSA enrichment
  54. 2026-09-11 18:13 UTCEG score recompute
  55. 2026-09-11 18:13 UTCGHSA enrichment
  56. 2026-09-11 14:53 UTCEPSS rescore
  57. 2026-09-11 05:24 UTCGHSA enrichment
  58. 2026-09-10 16:34 UTCEG score recompute
  59. 2026-09-10 16:34 UTCGHSA enrichment
  60. 2026-09-10 09:35 UTCEPSS rescore
  61. 2026-09-10 03:37 UTCGHSA enrichment
  62. 2026-09-09 14:49 UTCGHSA enrichment
  63. 2026-09-09 02:02 UTCEG score recompute
  64. 2026-09-09 02:02 UTCGHSA enrichment
  65. 2026-09-08 22:01 UTCEPSS rescore
  66. 2026-09-08 07:36 UTCGHSA enrichment
  67. 2026-09-07 18:47 UTCEG score recompute
  68. 2026-09-07 18:47 UTCGHSA enrichment
  69. 2026-09-07 05:59 UTCGHSA enrichment
  70. 2026-09-06 17:12 UTCEG score recompute
  71. 2026-09-06 17:12 UTCGHSA enrichment
  72. 2026-09-06 13:48 UTCEPSS rescore
  73. 2026-09-06 04:23 UTCGHSA enrichment
  74. 2026-09-05 15:36 UTCEG score recompute
  75. 2026-09-05 15:36 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-76987?
CVE-2026-76987 is a high vulnerability published on August 20, 2026. A security flaw has been discovered in liftoff-sr CIPster 1802525be27d33e19a9a83c163e331a1d13b1892. The impacted element is the function CipAttribute::GetAttrData/CipAttribute::SetAttrData of the file ciptypes.h of the component Generic Attribute Logic. Performing a manipulation results in memory…
When was CVE-2026-76987 disclosed?
CVE-2026-76987 was first published on August 20, 2026, with the most recent update on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76987 actively exploited?
CVE-2026-76987 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76987?
CVE-2026-76987 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-76987?
An upstream fix for CVE-2026-76987 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-76987 are linked in the Vendor Advisories panel on this page.

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