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CVE-2009-1786

26
FAUCET Score

CVE-2009-1786 describes a local privilege escalation vulnerability in IBM AIX 5.3 and 6.1, where a symlink attack on the malloc subsystem's log file, controlled by the MALLOCDEBUG environment variable, allows local users to create or overwrite arbitrary files. With a CVSS score of 6.9, this vulnerability is considered high severity, enabling complete compromise of confidentiality, integrity, and availability with medium attack complexity. There is no evidence of active exploitation, and no public exploit code is available in Metasploit or Nuclei, though an unrelated ExploitDB entry exists. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
5.3CPE matchmatch criteria
cpe:2.3:o:ibm:aix:5.3:*:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:o:ibm:aix:6.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.9MEDIUM

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.67%
Probability of exploitation in next 30 days
EPSS Percentile
48.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-33001 · May 20, 2009
This CVE's current EPSS score of 0.0067 is in the 84th percentile among its peer group of 1,595 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

aix.software.ibm.com / aix/efixes/security/libc_advisory.asc
PatchVendor Advisory
labs.idefense.com / intelligence/vulnerabilities/display.php
secunia.com / advisories/35146
Vendor Advisory
securitytracker.com / id
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/50636
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6276
exploit-db.com / exploits/9306
ibm.com / support/docview.wss
ibm.com / support/docview.wss
ibm.com / support/docview.wss
ibm.com / support/docview.wss
ibm.com / support/docview.wss
ibm.com / support/docview.wss
ibm.com / support/docview.wss
osvdb.org / 54617
securityfocus.com / bid/35034
vupen.com / english/advisories/2009/1380
Vendor Advisory