CVE-2026-88779

CRITICALPre-NVD 8.79.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-10-04), indicating real-world exploitation has been confirmed by US federal agencies. A secondary CVSS source baseline 8.7 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, secondary
Trending — KEV-added this weekExploited in the wild
9.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 0.3%CVSS: 8.7Exploit: cisa kev · ssvc activeExposed services: Not assessed

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

Vulnerability in NetScaler ADC and NetScaler Gateway.

This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.

CVSS v3
8.7
EG Score
9.0CRITICALhigh confidence
EG Risk
96
EG Risk 96/100CISA 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
Severity90% × 45%
Exploitation100% × 40%
Automatability100% × 15%
CISA SSVC: Attend at low or medium mission impact; Act at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation sooner than your standard update timelines at low or medium mission impact and as soon as possible at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
⚠ Exploited

CISA SSVCAttend at low or medium mission impact; Act at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation sooner than your standard update timelines at low or medium mission impact and as soon as possible at high, and watch the vendor's advisory for the fix.

Exploitation active (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

October 4, 2026

Last Modified

October 5, 2026

Advisory Details (1)

Auto-updated Oct 4, 2026
No patch confirmed yet.
generic

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https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174

Vendor Advisories for CVE-2026-88779(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 22× in last 7d / 22× 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.

  1. 2026-10-05 08:35 UTCGHSA enrichment
  2. 2026-10-05 04:34 UTCEG score recompute
  3. 2026-10-05 04:34 UTCGHSA enrichment
  4. 2026-10-05 03:59 UTCEG score recompute
  5. 2026-10-05 03:59 UTCGHSA enrichment
  6. 2026-10-05 01:19 UTCEG score recompute
  7. 2026-10-05 01:19 UTCGHSA enrichment
  8. 2026-10-04 23:22 UTCEPSS rescore
  9. 2026-10-04 21:18 UTCEG score recompute
  10. 2026-10-04 21:18 UTCGHSA enrichment
  11. 2026-10-04 20:29 UTCEG score recompute
  12. 2026-10-04 20:29 UTCGHSA enrichment
  13. 2026-10-04 19:48 UTCEG score recompute▲ 0.30
  14. 2026-10-04 19:48 UTCGHSA enrichment
  15. 2026-10-04 19:48 UTCCISA KEV update
  16. 2026-10-04 16:25 UTCEG score recompute
  17. 2026-10-04 16:25 UTCGHSA enrichment
  18. 2026-10-04 15:58 UTCEG score recompute
  19. 2026-10-04 15:58 UTCGHSA enrichment
  20. 2026-10-04 04:32 UTCEG score recompute
  21. 2026-10-04 03:23 UTCEG score recompute
  22. 2026-10-04 03:23 UTCMITRE cvelistV5first tracked

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Frequently asked(6)

What is CVE-2026-88779?
CVE-2026-88779 is a critical vulnerability published on October 4, 2026. Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.
When was CVE-2026-88779 disclosed?
CVE-2026-88779 was first published on October 4, 2026, with the most recent update on October 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88779 actively exploited?
Yes. CISA added CVE-2026-88779 to the Known Exploited Vulnerabilities catalog on October 4, 2026, affecting Citrix NetScaler. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation, and watch the vendor's advisory for the fix.
What is the CVSS score of CVE-2026-88779?
CVE-2026-88779 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
Which products are affected by CVE-2026-88779?
CVE-2026-88779 affects Citrix NetScaler.
How do I remediate CVE-2026-88779?
No fix for CVE-2026-88779 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-2026-88779 are linked in the Vendor Advisories panel on this page.

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