CVE-2010-1383: CFNetwork in Apple Safari before 5.0.6 on Windows allows remote web servers to execute arbitrary code by repla

Q: How do I fix CVE-2010-1383?

cfnetwork: mitigate or apply the listed mitigation; safari: upgrade to newer than 5.0.5. Exact commands for each OS are on this page.

Q: Is CVE-2010-1383 being exploited?

CVE-2010-1383 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2010-1383 affect?

CVE-2010-1383 affects cfnetwork, safari. Severity is high (CVSS 9.3). CFNetwork in Apple Safari before 5.0.6 on Windows allows remote web servers to execute arbitrary code by replaying the NTLM credentials of a client user, related to a "credential reflection" issue.

Q: How urgent is CVE-2010-1383?

Priority 53/100. Critical severity

This month

HIGH 9.3MITIGATEUPGRADE

CVE-2010-1383 is a high-severity flaw (CVSS 9.3) affecting cfnetwork, safari. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CFNetwork in Apple Safari before 5.0.6 on Windows allows remote web servers to execute arbitrary code by replaying the NTLM credentials of a client user, related to a "credential reflection" issue.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (High)
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-255
Published	2011-07-21
Last modified	2026-06-16

Publisher (CNA): Apple Inc. · Vendor: apple

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-07-21 23:55 UTCPublished CVE record published
2026-06-16 23:18 UTCUpdated Record last modified

apple cfnetwork MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cfnetwork || rpm -q cfnetwork || cfnetwork --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

apple safari UPGRADE

Affected: <= 5.0.5 · 1.0 · 1.0 beta · 1.0 beta2 · 1.0.0 · 1.0.0b1 · 1.0.0b2 · 1.0.1

Fixed in: newer than 5.0.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy safari || rpm -q safari || safari --version

2. UPGRADE to newer than 5.0.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade safari

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade safari

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2010-1383?

cfnetwork: mitigate or apply the listed mitigation; safari: upgrade to newer than 5.0.5. Exact commands for each OS are on this page.

Is CVE-2010-1383 being exploited?

CVE-2010-1383 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2010-1383 affect?

CVE-2010-1383 affects cfnetwork, safari. Severity is high (CVSS 9.3). CFNetwork in Apple Safari before 5.0.6 on Windows allows remote web servers to execute arbitrary code by replaying the NTLM credentials of a client user, related to a "credential reflection" issue.

How urgent is CVE-2010-1383?

Priority 53/100. Critical severity

Software pages

Windows vulnerabilities · Safari vulnerabilities · Apple Safari and WebKit vulnerabilities

Related CVEs

CVE-2011-0214 MEDIUM 5.0 MITIGATE UPGRADE CFNetwork in Apple Safari before 5.0.6 on Windows does not properly handle an untrusted attribute of a system
CVE-2010-1800 MEDIUM 5.0 MITIGATE MITIGATE CFNetwork in Apple Mac OS X 10.6.3 and 10.6.4 supports anonymous SSL and TLS connections, which allows man-in-
CVE-2010-1420 MEDIUM 4.3 MITIGATE UPGRADE Cross-site scripting (XSS) vulnerability in CFNetwork in Apple Safari before 5.0.6 allows remote attackers to
CVE-2007-2403 MEDIUM 6.8 MITIGATE CFNetwork on Apple Mac OS X 10.3.9 and 10.4.10 does not properly validate ftp: URIs, which allows remote attac
CVE-2007-0464 MEDIUM 5.0 DOWNGRADE The _CFNetConnectionWillEnqueueRequests function in CFNetwork 129.19 on Apple Mac OS X 10.4 through 10.4.10 al

References

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