CVE-2026-8979

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 54% of all CVEs by exploit prediction. 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: epss, nvd
Trending — 3 sources updated this weekElevated
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.3Exploit: Elevated riskExposed: 0

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

The Mennekes Amtron series (firmware versions ≤ 5.22.3) is vulnerable to an authentication bypass. An unauthenticated remote attacker can change the password of the user account via a crafted POST request to the /operator/operator endpoint.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
58(Track*)
EG Risk 58/100SSVC: Track*

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
Severity93% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

May 28, 2026

Last Modified

May 28, 2026

Advisory Details (1)

Auto-updated May 28, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Multiple Vulnerabilities in Mennekes Amtron Series | CyberDanube

https://cyberdanube.com/security-research/multiple-vulnerabilities-in-mennekes-amtron-series/

Vendor Advisories for CVE-2026-8979(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 14× in last 7d / 48× 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 215 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8979?
CVE-2026-8979 is a critical vulnerability published on May 28, 2026. The Mennekes Amtron series (firmware versions ≤ 5.22.3) is vulnerable to an authentication bypass. An unauthenticated remote attacker can change the password of the user account via a crafted POST request to the /operator/operator endpoint.
When was CVE-2026-8979 disclosed?
CVE-2026-8979 was first published in the National Vulnerability Database on May 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8979 actively exploited?
CVE-2026-8979 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.1% of all scored CVEs.
What is the CVSS score of CVE-2026-8979?
CVE-2026-8979 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-8979?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8979, 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.

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