CVE-2026-55399

MEDIUMNVD 4.34.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 4.3 from GitHub Security Advisory published 2026-07-15. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.3Exploit: None knownExposed services: Not assessed

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

The CVE record's CNA (Absolute Software) lists Absolute Security Secure Access versions before 14.55 as affected. No release containing a fix is confirmed on record.

CVE-2026-55399 is a resource exhaustion vulnerability in the Secure Access publisher prior to 14.55. Attackers with valid credentials to the Secure Access tunnel can create a non-persistent DoS against the publisher.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

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 (value × EchelonGraph’s weight)
Severity43% × 45%
The EG Score, 4.3 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
28th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 15, 2026

Last Modified

July 16, 2026

Advisory Details (1)

Auto-updated Jul 16, 2026
No fix on record yet.
Web page

CVE-2026-55399 | Absolute Security

https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-55399

Vendor Advisories for CVE-2026-55399(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 11× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 174 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 74 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  3. 2026-10-12 15:55 UTCEG score recompute
  4. 2026-10-11 19:39 UTCEG score recompute
  5. 2026-10-11 16:54 UTCEG score recompute
  6. 2026-10-11 14:17 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  18. 2026-10-01 12:36 UTCEG score recompute
  19. 2026-10-01 12:36 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  21. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  23. 2026-09-28 08:41 UTCEG score recompute
  24. 2026-09-28 08:41 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
Show 75 more
  1. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  2. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  3. 2026-09-24 08:45 UTCEG score recompute
  4. 2026-09-24 08:45 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  5. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  6. 2026-09-23 03:14 UTCEG score recompute
  7. 2026-09-23 03:14 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  8. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  9. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  10. 2026-09-18 04:43 UTCEG score recompute
  11. 2026-09-18 04:43 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  12. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  13. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  14. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  15. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  16. 2026-09-14 07:25 UTCEG score recompute
  17. 2026-09-14 07:25 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  18. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  19. 2026-09-13 07:12 UTCEG score recompute
  20. 2026-09-13 07:12 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  21. 2026-09-11 21:44 UTCEG score recompute
  22. 2026-09-11 21:44 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  23. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  24. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  25. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  26. 2026-09-08 00:42 UTCEG score recompute
  27. 2026-09-08 00:42 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  28. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  29. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  30. 2026-09-05 20:46 UTCEG score recompute
  31. 2026-09-05 20:46 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  32. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  33. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  34. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  35. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  36. 2026-08-31 03:59 UTCEG score recompute
  37. 2026-08-31 03:59 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  38. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  39. 2026-08-30 03:45 UTCEG score recompute
  40. 2026-08-30 03:45 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  41. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  42. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  43. 2026-08-28 02:27 UTCEG score recompute
  44. 2026-08-28 02:27 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  45. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  46. 2026-08-27 01:50 UTCEG score recompute
  47. 2026-08-27 01:50 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  48. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  49. 2026-08-26 01:35 UTCEG score recompute
  50. 2026-08-26 01:35 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  51. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  52. 2026-08-25 01:21 UTCEG score recompute
  53. 2026-08-25 01:21 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  54. 2026-08-24 01:08 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  55. 2026-08-23 00:55 UTCEG score recompute
  56. 2026-08-23 00:55 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  57. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  58. 2026-08-22 00:41 UTCEG score recompute
  59. 2026-08-22 00:41 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  60. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  61. 2026-08-21 00:26 UTCEG score recompute
  62. 2026-08-21 00:26 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  63. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  64. 2026-08-20 00:13 UTCEG score recompute
  65. 2026-08-20 00:13 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  66. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  67. 2026-08-18 21:53 UTCEG score recompute
  68. 2026-08-18 21:53 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  69. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  70. 2026-08-17 21:20 UTCEG score recompute
  71. 2026-08-17 21:20 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  72. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  73. 2026-08-16 17:50 UTCEG score recompute
  74. 2026-08-16 17:50 UTCGHSA enrichmentGHSA-6659-73gf-7pwg · GitHub CVSS 4.3
  75. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 12th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55399?
CVE-2026-55399 is a medium-severity vulnerability; its CVE record was published on July 15, 2026. CVE-2026-55399 is a resource exhaustion vulnerability in the Secure Access publisher prior to 14.55. Attackers with valid credentials to the Secure Access tunnel can create a non-persistent DoS against the publisher.
When was the CVE record for CVE-2026-55399 published?
The CVE record for CVE-2026-55399 was published on July 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 16, 2026; the record at its source may have been updated since.
Is CVE-2026-55399 actively exploited?
CVE-2026-55399 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55399?
CVE-2026-55399 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-55399?
No fix for CVE-2026-55399 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 CVE record's CNA (Absolute Software) lists Absolute Security Secure Access versions before 14.55 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-55399 are linked in the Vendor Advisories panel on this page.

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