High 7.5Published Aug 6, 2009

CVE-2009-2191Format string vulnerability in Login Window in Apple Mac OS X 10.4.11 and 10.5 before 10.5.8 allows attackers to execute arbitrary code or cause a denial of service (application crash) via format str…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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It affects apple mac_os_x and 1 other product. Add what you run to find out whether that includes you.

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Format string vulnerability in Login Window in Apple Mac OS X 10.4.11 and 10.5 before 10.5.8 allows attackers to execute arbitrary code or cause a denial of service (application crash) via format string specifiers in an application name.

CVSS: 7.5 HIGH (v2.0, NVD)AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-134
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

apple mac_os_x apple:mac_os_x	10.5.6; 10.4.11; 10.5; 10.5.7	NVD
apple mac_os_x_server apple:mac_os_x_server	10.4.11; 10.5.5; 10.5.6; 10.5.7	NVD

References

References

http://lists.apple.com/archives/security-announce/2009/Aug/msg00001.html	patch, vendor-advisory
http://osvdb.org/56840
http://secunia.com/advisories/36096	vendor-advisory
http://support.apple.com/kb/HT3757	patch, vendor-advisory
http://www.securityfocus.com/bid/35954	patch
http://www.us-cert.gov/cas/techalerts/TA09-218A.html	us-government-resource
http://www.vupen.com/english/advisories/2009/2172	patch, vendor-advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/52428

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.