CVE-2026-55401

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-08-13. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.3Exploit: None knownExposed services: Not assessed

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

CVE-2026-55401 is a null dereference vulnerability on the load-balancing sub-system of Secure Access servers prior to 14.57. Attackers can send an unauthenticated packet to a Secure Access server with load balancing enabled, which results in the internal load balancer crashing. After a successful attack, the Secure Access server is still able to accept connections and is still able to issue a failover to connected clients. ‍ https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100CISA 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. 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, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

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

No fix is confirmed yet. 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, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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 13, 2026

Last Modified

September 4, 2026

Advisory Details (1)

Auto-updated Aug 13, 2026
No patch confirmed yet.
generic

CVE-2026-55401 | Absolute Security

https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-55401

Vendor Advisories for CVE-2026-55401(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 / 70× 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 136 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 22:19 UTCGHSA enrichment
  3. 2026-10-03 19:48 UTCEG score recompute
  4. 2026-10-03 19:48 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 17:56 UTCEPSS rescore
  7. 2026-10-02 07:33 UTCEG score recompute
  8. 2026-10-02 07:33 UTCGHSA enrichment
  9. 2026-10-01 19:50 UTCEPSS rescore
  10. 2026-09-30 21:46 UTCEG score recompute
  11. 2026-09-30 21:46 UTCGHSA enrichment
  12. 2026-09-30 15:03 UTCEPSS rescore
  13. 2026-09-29 15:22 UTCEPSS rescore
  14. 2026-09-28 13:51 UTCEPSS rescore
  15. 2026-09-28 11:08 UTCEG score recompute
  16. 2026-09-28 11:08 UTCGHSA enrichment
  17. 2026-09-27 13:48 UTCEPSS rescore
  18. 2026-09-27 09:44 UTCEG score recompute
  19. 2026-09-27 09:44 UTCGHSA enrichment
  20. 2026-09-26 15:59 UTCEPSS rescore
  21. 2026-09-25 11:58 UTCEG score recompute
  22. 2026-09-25 11:58 UTCGHSA enrichment
  23. 2026-09-24 14:04 UTCEPSS rescore
  24. 2026-09-24 10:29 UTCEG score recompute
  25. 2026-09-24 10:29 UTCGHSA enrichment
Show 75 more
  1. 2026-09-23 17:54 UTCEPSS rescore
  2. 2026-09-23 09:05 UTCEG score recompute
  3. 2026-09-23 09:05 UTCGHSA enrichment
  4. 2026-09-22 07:41 UTCEG score recompute
  5. 2026-09-22 07:41 UTCGHSA enrichment
  6. 2026-09-21 06:17 UTCEG score recompute
  7. 2026-09-21 06:17 UTCGHSA enrichment
  8. 2026-09-20 20:16 UTCEPSS rescore
  9. 2026-09-20 04:10 UTCEG score recompute
  10. 2026-09-20 04:10 UTCGHSA enrichment
  11. 2026-09-19 02:47 UTCEG score recompute
  12. 2026-09-19 02:47 UTCGHSA enrichment
  13. 2026-09-18 19:28 UTCEPSS rescore
  14. 2026-09-18 01:23 UTCEG score recompute
  15. 2026-09-18 01:23 UTCGHSA enrichment
  16. 2026-09-17 19:31 UTCEPSS rescore
  17. 2026-09-16 23:59 UTCEG score recompute
  18. 2026-09-16 23:59 UTCGHSA enrichment
  19. 2026-09-16 14:08 UTCEPSS rescore
  20. 2026-09-16 05:15 UTCEPSS rescore
  21. 2026-09-15 13:23 UTCEG score recompute
  22. 2026-09-15 13:23 UTCGHSA enrichment
  23. 2026-09-15 03:11 UTCEPSS rescore
  24. 2026-09-14 11:59 UTCEG score recompute
  25. 2026-09-14 11:59 UTCGHSA enrichment
  26. 2026-09-13 16:47 UTCEPSS rescore
  27. 2026-09-13 10:35 UTCEG score recompute
  28. 2026-09-13 10:35 UTCGHSA enrichment
  29. 2026-09-12 09:09 UTCEG score recompute
  30. 2026-09-12 09:09 UTCGHSA enrichment
  31. 2026-09-11 07:44 UTCEG score recompute
  32. 2026-09-11 07:44 UTCGHSA enrichment
  33. 2026-09-10 09:35 UTCEPSS rescore
  34. 2026-09-10 06:21 UTCGHSA enrichment
  35. 2026-09-09 04:57 UTCEG score recompute
  36. 2026-09-09 04:57 UTCGHSA enrichment
  37. 2026-09-08 22:01 UTCEPSS rescore
  38. 2026-09-08 01:07 UTCEG score recompute
  39. 2026-09-08 01:07 UTCGHSA enrichment
  40. 2026-09-07 16:01 UTCEPSS rescore
  41. 2026-09-06 23:44 UTCEG score recompute
  42. 2026-09-06 23:44 UTCGHSA enrichment
  43. 2026-09-06 13:47 UTCEPSS rescore
  44. 2026-09-05 22:09 UTCEG score recompute
  45. 2026-09-05 22:09 UTCGHSA enrichment
  46. 2026-09-04 20:45 UTCEG score recompute▼ 1.60
  47. 2026-09-04 20:45 UTCGHSA enrichment
  48. 2026-09-04 20:41 UTCNVD updateCVSS v3 → 5.3
  49. 2026-09-04 07:52 UTCEG score recompute
  50. 2026-09-04 07:52 UTCGHSA enrichment
  51. 2026-09-04 05:06 UTCEPSS rescore
  52. 2026-09-03 05:54 UTCEG score recompute
  53. 2026-09-03 05:54 UTCGHSA enrichment
  54. 2026-09-02 14:12 UTCEPSS rescore
  55. 2026-09-02 03:51 UTCEG score recompute
  56. 2026-09-02 03:50 UTCGHSA enrichment
  57. 2026-09-01 13:54 UTCEPSS rescore
  58. 2026-09-01 04:40 UTCEPSS rescore
  59. 2026-09-01 01:58 UTCGHSA enrichment
  60. 2026-08-31 00:33 UTCEG score recompute
  61. 2026-08-31 00:33 UTCGHSA enrichment
  62. 2026-08-30 19:17 UTCEPSS rescore
  63. 2026-08-30 01:22 UTCEPSS rescore
  64. 2026-08-29 23:09 UTCGHSA enrichment
  65. 2026-08-28 21:44 UTCEG score recompute
  66. 2026-08-28 21:44 UTCGHSA enrichment
  67. 2026-08-28 21:41 UTCEPSS rescore
  68. 2026-08-27 14:44 UTCEG score recompute
  69. 2026-08-27 14:44 UTCGHSA enrichment
  70. 2026-08-27 14:25 UTCEPSS rescore
  71. 2026-08-26 14:46 UTCEPSS rescore
  72. 2026-08-26 13:19 UTCEG score recompute
  73. 2026-08-26 13:18 UTCGHSA enrichment
  74. 2026-08-25 13:49 UTCEPSS rescore
  75. 2026-08-25 11:47 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-55401?
CVE-2026-55401 is a medium vulnerability published on August 13, 2026. CVE-2026-55401 is a null dereference vulnerability on the load-balancing sub-system of Secure Access servers prior to 14.57. Attackers can send an unauthenticated packet to a Secure Access server with load balancing enabled, which results in the internal load balancer crashing. After a successful…
When was CVE-2026-55401 disclosed?
CVE-2026-55401 was first published on August 13, 2026, with the most recent update on September 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55401 actively exploited?
CVE-2026-55401 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55401?
CVE-2026-55401 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-55401?
No fix for CVE-2026-55401 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-2026-55401 are linked in the Vendor Advisories panel on this page.

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