A race condition was addressed with improved handling of symbolic links. This issue is fixed in iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3, visionOS 26.3. A shortcut may be able to bypass sandbox restrictions.
CVE-2026-20677
CRITICALNVD 9.09.0—
EchelonGraph scoreMEDIUM confidence
Score 9.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-02-12. NVD baseline CVSS 9.0; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.0Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.0
- EG Score
- 9.0(medium)
- EG Risk
- 41(Track)EG Risk 41/100SSVC: 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 computedSeverity90% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 21%
- KEV
- Not listed
Published
February 11, 2026
Last Modified
August 21, 2026
Advisory Details (5)
Auto-updated May 22, 2026No patch confirmed yet.
generic
About the security content of visionOS 26.3 - Apple Support
https://support.apple.com/en-us/126353generic
About the security content of macOS Sonoma 14.8.4 - Apple Support
https://support.apple.com/en-us/126350generic
About the security content of macOS Tahoe 26.3 - Apple Support
https://support.apple.com/en-us/126348generic
About the security content of iOS 18.7.5 and iPadOS 18.7.5 - Apple Support
https://support.apple.com/en-us/126347generic
About the security content of iOS 26.3 and iPadOS 26.3 - Apple Support
https://support.apple.com/en-us/126346Vendor Advisories for CVE-2026-20677(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Frequently asked(5)
What is CVE-2026-20677?
CVE-2026-20677 is a critical vulnerability published on February 11, 2026. A race condition was addressed with improved handling of symbolic links. This issue is fixed in iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3, visionOS 26.3. A shortcut may be able to bypass sandbox restrictions.
When was CVE-2026-20677 disclosed?
CVE-2026-20677 was first published in the National Vulnerability Database on February 11, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20677 actively exploited?
CVE-2026-20677 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 78.7% of all scored CVEs.
What is the CVSS score of CVE-2026-20677?
CVE-2026-20677 has a CVSS v3 base score of 9.0 (NVD).
How do I remediate CVE-2026-20677?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20677, 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-2026-20677
Is Your Infrastructure Affected by CVE-2026-20677?
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