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Fencer Vulns
high 7.8

CVE-2020-27911 json

An integer overflow was addressed through improved input validation.

published 2020-12-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20404

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

An integer overflow was addressed through improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 14.2 and iPadOS 14.2, iCloud for Windows 11.5, tvOS 14.2, iTunes 12.11 for Windows. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.

Patch / fix

  • Apple watchOS 7.1
  • Apple iOS and iPadOS 14.2
  • Apple tvOS 14.2
  • Apple macOS 11.0, 11.5, 12.11

Exploit prediction

3.40% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

  • Apple watchOS
  • Apple iOS and iPadOS
  • Apple tvOS
  • Apple macOS

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.