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Fencer Vulns
critical 9.8

CVE-2016-4607 json

libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before 12.4.2 on Windows, iCloud before 5.2.1 on Windows, tvOS before 9.2.2,…

published 2016-07-22 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-5593

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.0%
EPSS 5.0% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before 12.4.2 on Windows, iCloud before 5.2.1 on Windows, tvOS before 9.2.2, and watchOS before 2.2.2 allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors, a different vulnerability than CVE-2016-4608, CVE-2016-4609, CVE-2016-4610, and CVE-2016-4612.

Patch / fix

  • xmlsoft libxslt 1.1.29
  • apple icloud 5.2.1
  • apple itunes 12.4.2
  • apple iphone_os 9.3.3
  • apple mac_os_x 10.11.6
  • apple tvos 9.2.2
  • apple watchos 2.2.2
  • libxslt Ubuntu 14.04 LTS 1.1.28-2ubuntu0.1
  • libxslt Ubuntu 16.04 LTS 1.1.28-2.1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2016-4607

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-4607 updated cvss 4.3

libxslt: allows remote attacker to cause denial of service

  • Red Hat Enterprise Linux 5 libxslt Red Hat Enterprise Linux 6 libxslt, libxslt-python
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 libxslt, libxslt-python Red Hat OpenStack Platform 9 (Mitaka) libxslt-python Red Hat OpenStack Platform 10 (Newton) libxslt-python Red Hat OpenStack Platform 13 (Queens) libxslt-python Red Hat OpenStack Platform 14 (Rocky) libxslt-python
    affected: no fix planned “Will not fix”
  • Red Hat Storage 3 libxslt, libxslt-python
    affected: no fix available
  • Red Hat Enterprise Linux 8 libxslt
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.96% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.