CVE-2026-20698

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-03-25. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: Elevated riskExposed: 0

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

The issue was addressed with improved memory handling. This issue is fixed in iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. An app may be able to cause unexpected system termination or corrupt kernel memory.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

March 25, 2026

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic

About the security content of visionOS 26.4 - Apple Support

https://support.apple.com/en-us/126799
generic

About the security content of watchOS 26.4 - Apple Support

https://support.apple.com/en-us/126798
generic

About the security content of tvOS 26.4 - Apple Support

https://support.apple.com/en-us/126797
generic

About the security content of macOS Tahoe 26.4 - Apple Support

https://support.apple.com/en-us/126794
generic

About the security content of iOS 26.4 and iPadOS 26.4 - Apple Support

https://support.apple.com/en-us/126792

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 23× 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. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-16 14:07 UTCEPSS rescore
  3. 2026-09-16 05:15 UTCEPSS rescore
  4. 2026-09-13 16:47 UTCEPSS rescore
  5. 2026-09-12 15:01 UTCEPSS rescore
  6. 2026-09-11 14:52 UTCEPSS rescore
  7. 2026-09-10 09:34 UTCEPSS rescore
  8. 2026-09-08 22:00 UTCEPSS rescore
  9. 2026-09-07 16:01 UTCEPSS rescore
  10. 2026-09-06 13:47 UTCEPSS rescore
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-04 05:06 UTCEPSS rescore
  13. 2026-09-02 14:11 UTCEPSS rescore
  14. 2026-09-01 13:53 UTCEPSS rescore
  15. 2026-09-01 04:39 UTCEPSS rescore
  16. 2026-08-30 19:17 UTCEPSS rescore
  17. 2026-08-30 01:22 UTCEPSS rescore
  18. 2026-08-28 21:41 UTCEPSS rescore
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-26 14:46 UTCEPSS rescore
  21. 2026-08-25 13:48 UTCEPSS rescore
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-19 17:03 UTCEPSS rescore
Show 46 more
  1. 2026-08-18 13:48 UTCEPSS rescore
  2. 2026-08-17 13:47 UTCEPSS rescore
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 10:28 UTCEG score recompute
  5. 2026-08-16 10:28 UTCGHSA enrichment
  6. 2026-08-16 02:14 UTCEPSS rescore
  7. 2026-08-15 01:30 UTCEPSS rescore
  8. 2026-08-14 19:38 UTCGHSA enrichment
  9. 2026-08-14 06:47 UTCEG score recompute
  10. 2026-08-14 06:47 UTCGHSA enrichment
  11. 2026-08-13 22:00 UTCEPSS rescore
  12. 2026-08-12 21:27 UTCEG score recompute
  13. 2026-08-12 21:27 UTCGHSA enrichment
  14. 2026-08-12 13:50 UTCEPSS rescore
  15. 2026-08-11 21:02 UTCEG score recompute
  16. 2026-08-11 21:02 UTCGHSA enrichment
  17. 2026-08-11 13:42 UTCEPSS rescore
  18. 2026-08-11 04:07 UTCEG score recompute
  19. 2026-08-11 04:07 UTCGHSA enrichment
  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-10 05:15 UTCGHSA enrichment
  22. 2026-08-09 17:49 UTCEG score recompute
  23. 2026-08-09 17:49 UTCGHSA enrichment
  24. 2026-08-09 13:46 UTCEPSS rescore
  25. 2026-08-09 06:23 UTCEG score recompute
  26. 2026-08-09 06:23 UTCGHSA enrichment
  27. 2026-08-08 16:37 UTCEPSS rescore
  28. 2026-08-08 04:07 UTCGHSA enrichment
  29. 2026-08-07 16:41 UTCEG score recompute
  30. 2026-08-07 16:41 UTCGHSA enrichment
  31. 2026-08-06 19:03 UTCEG score recompute
  32. 2026-08-06 19:03 UTCGHSA enrichment
  33. 2026-08-06 13:46 UTCEPSS rescore
  34. 2026-08-06 01:08 UTCEG score recompute
  35. 2026-08-06 01:08 UTCGHSA enrichment
  36. 2026-08-05 19:17 UTCEPSS rescore
  37. 2026-08-04 15:10 UTCEPSS rescore
  38. 2026-08-04 10:38 UTCEPSS rescore
  39. 2026-08-03 23:53 UTCGHSA enrichment
  40. 2026-08-02 15:42 UTCEG score recompute
  41. 2026-08-02 15:42 UTCGHSA enrichment
  42. 2026-08-02 02:26 UTCEPSS rescore
  43. 2026-08-01 04:15 UTCEPSS rescore
  44. 2026-07-30 01:30 UTCEPSS rescore
  45. 2026-07-27 14:27 UTCEG score recompute
  46. 2026-07-27 14:27 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 PoCSomisomair/CVE-2026-20698-PF_ROUTE-Heap-Overflow
    First seen Mar 30, 2026

    CVE-2026-20698: XNU kernel heap overflow via PF_ROUTE RTA_GENMASK. PoC and analysis. Independently discovered.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-20698?
CVE-2026-20698 is a high vulnerability published on March 25, 2026. The issue was addressed with improved memory handling. This issue is fixed in iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. An app may be able to cause unexpected system termination or corrupt kernel memory.
When was CVE-2026-20698 disclosed?
CVE-2026-20698 was first published in the National Vulnerability Database on March 25, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20698 actively exploited?
CVE-2026-20698 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 74.1% of all scored CVEs.
What is the CVSS score of CVE-2026-20698?
CVE-2026-20698 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-20698?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20698, 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-2026-20698

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