CVE-2026-0244

HIGHNVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

Score 8.1 from GitHub Security Advisory published 2026-05-13. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (Palo Alto Networks, Inc.) states them: "Prisma SD-WAN ION 6.5 6.5.1 through 6.5.3 Upgrade to 6.5.3-b15 or later."

An improper certificate validation vulnerability in the Palo Alto Networks Prisma SD-WAN ION enables man-in-the-middle (MitM) attacker to impersonate the controller.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation0.2% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 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 total (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

May 13, 2026

Last Modified

July 14, 2026

Advisory Details (1)

Auto-updated Jun 16, 2026
Patch available.
Web page

CVE-2026-0244 Prisma SD-WAN: Improper Certificate Validation Vulnerability

https://security.paloaltonetworks.com/CVE-2026-0244

Vendor Advisories for CVE-2026-0244(2)

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 / 24× 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 223 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 123 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-12 16:42 UTCEG score recompute
  3. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-11 20:17 UTCEG score recompute
  5. 2026-10-11 18:30 UTCEG score recompute
  6. 2026-10-11 15:03 UTCEG score recompute
  7. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  8. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  17. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  21. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  22. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  24. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
Show 75 more
  1. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  4. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  5. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  6. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-08-23 17:51 UTCEG score recompute
  17. 2026-08-23 17:51 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  18. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  19. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  20. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-08-20 19:48 UTCEG score recompute
  22. 2026-08-20 19:48 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  23. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  24. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-08-17 10:39 UTCEG score recompute
  26. 2026-08-17 10:39 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  27. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  28. 2026-08-16 04:03 UTCEG score recompute
  29. 2026-08-16 04:03 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  30. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  31. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  32. 2026-08-15 01:14 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  33. 2026-08-14 13:52 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  34. 2026-08-14 02:31 UTCEG score recompute
  35. 2026-08-14 02:31 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  36. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  37. 2026-08-13 03:11 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  38. 2026-08-12 15:49 UTCEG score recompute
  39. 2026-08-12 15:49 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  40. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  41. 2026-08-11 15:28 UTCEG score recompute
  42. 2026-08-11 15:28 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  43. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  44. 2026-08-11 00:56 UTCEG score recompute
  45. 2026-08-11 00:56 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  46. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  47. 2026-08-10 11:59 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  48. 2026-08-10 00:37 UTCEG score recompute
  49. 2026-08-10 00:37 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  50. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  51. 2026-08-09 13:16 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  52. 2026-08-09 01:54 UTCEG score recompute
  53. 2026-08-09 01:54 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  54. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  55. 2026-08-08 06:36 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  56. 2026-08-07 19:15 UTCEG score recompute
  57. 2026-08-07 19:15 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  58. 2026-08-07 07:53 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  59. 2026-08-06 20:24 UTCEG score recompute
  60. 2026-08-06 20:24 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  61. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  62. 2026-08-06 09:03 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  63. 2026-08-05 21:40 UTCEG score recompute
  64. 2026-08-05 21:40 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  65. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  66. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  67. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  68. 2026-08-03 19:08 UTCEG score recompute
  69. 2026-08-03 19:08 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  70. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  71. 2026-08-02 19:31 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  72. 2026-08-02 08:09 UTCEG score recompute
  73. 2026-08-02 08:09 UTCGHSA enrichmentGHSA-9343-chmf-h73m · GitHub CVSS 8.1
  74. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  75. 2026-08-01 19:50 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-0244?
CVE-2026-0244 is a high-severity vulnerability; its CVE record was published on May 13, 2026. An improper certificate validation vulnerability in the Palo Alto Networks Prisma SD-WAN ION enables man-in-the-middle (MitM) attacker to impersonate the controller.
When was CVE-2026-0244 made public?
CVE-2026-0244 was made public on May 13, 2026: that is the date its CVE record's CNA, Palo Alto Networks, Inc., gives for when the vulnerability was made public. The CVE record itself was published on May 13, 2026. EchelonGraph's copy of the record carries a last-modified date of July 14, 2026; the record at its source may have been updated since.
Is CVE-2026-0244 actively exploited?
CVE-2026-0244 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-0244?
CVE-2026-0244 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-0244?
A fix for CVE-2026-0244 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (Palo Alto Networks, Inc.) states them: "Prisma SD-WAN ION 6.5 6.5.1 through 6.5.3 Upgrade to 6.5.3-b15 or later." The vendor advisories EchelonGraph has for CVE-2026-0244 are linked in the Vendor Advisories panel on this page.

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