CVE-2026-8452

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-08-26), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • 3,670 internet-exposed hosts are running an affected version right now
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 2%CVSS: 9.8Exploit: cisa kev · ssvc active · public exploitExposed: 3,670

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

Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server

Live · internet exposure

3,670 internet-exposed hosts are running an affected version of CVE-2026-8452 right now.

across 51 countries (Germany, Australia, United States, United Kingdom, Bulgaria)top: netscaler_gateway
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Attend)
EG Risk 99/100SSVC: Attend

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%
Exploitation100% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
2%
EPSS %ILE
75%
KEV
⚠ Exploited

Published

June 30, 2026

Last Modified

August 27, 2026

Advisory Details (2)

Auto-updated Sep 17, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8452
generic

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https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604

Vendor Advisories for CVE-2026-8452(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 60× in last 7d / 242× 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 555 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCwatchtowrlabs/watchTowr-vs-Citrix-Netscaler-PreAuth-RCE-CVE-2026-8452
    First seen Aug 14, 2026

    CVE-2026-8452 PreAuth RCE

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2026-8452?
CVE-2026-8452 is a critical vulnerability published on June 30, 2026. Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server
When was CVE-2026-8452 disclosed?
CVE-2026-8452 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8452 actively exploited?
Yes. CISA added CVE-2026-8452 to the Known Exploited Vulnerabilities catalog on August 26, 2026, affecting Citrix NetScaler ADC and NetScaler Gateway. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-8452?
CVE-2026-8452 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2026-8452?
CVE-2026-8452 affects Citrix NetScaler ADC and NetScaler Gateway. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-8452?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8452, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-8452

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