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CVE-2010-0055

30
FAUCET Score

CVE-2010-0055 describes a critical vulnerability in Apple Mac OS X 10.5.8 where the xar utility fails to properly validate package signatures, allowing attackers to modify packages with an unspecified but potentially severe impact. With a CVSS score of 10.0, this vulnerability is easily exploitable over the network with no authentication required, leading to complete compromise of confidentiality, integrity, and availability. While no public exploits, Metasploit modules, or Nuclei templates are available, and there's minimal community discussion or media coverage, its high FAUCET Risk Score of 80/100 indicates significant inherent risk. There is no evidence of active exploitation, and it is not listed in the KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
10.5.8CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:10.5.8:*:*:*:*:*:*:*
10.5.8CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x_server:10.5.8:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.98%
Probability of exploitation in next 30 days
EPSS Percentile
78.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0198 is in the 62nd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

applepatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2010-0055Moderate

xar: signature bypass vulnerability

Mar 4, 2010

References

lists.apple.com / archives/security-announce/2010//Mar/msg00001.html
PatchVendor Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WXQ3NRRTC4A3F3GW2RQNATJHYDIRSCBS
support.apple.com / kb/HT4077
PatchVendor Advisory