CVE-2025-12686

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-27. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 9.8Exploit: None knownExposed: 0

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

Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in AdminCenter in Synology BeeStation OS before 1.3.2-65648 allows remote attackers to execute arbitrary code via unspecified vectors.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation3% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
85%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 5, 2026

Advisory Details (1)

Auto-updated Sep 9, 2026
No patch confirmed yet.
generic

Synology_SA_25_12 | Synology Inc.

https://www.synology.com/en-global/security/advisory/Synology_SA_25_12

Vendor Advisories for CVE-2025-12686(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 8× in last 7d / 41× 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 366 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2025-12686?
CVE-2025-12686 is a critical vulnerability published on May 27, 2026. Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in AdminCenter in Synology BeeStation OS before 1.3.2-65648 allows remote attackers to execute arbitrary code via unspecified vectors.
When was CVE-2025-12686 disclosed?
CVE-2025-12686 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on June 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-12686 actively exploited?
CVE-2025-12686 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 14.5% of all scored CVEs.
What is the CVSS score of CVE-2025-12686?
CVE-2025-12686 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-12686?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-12686, 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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