CVE-2009-1786

NONECVSS 0.0Weaponized
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 1%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The malloc subsystem in libc in IBM AIX 5.3 and 6.1 allows local users to create or overwrite arbitrary files via a symlink attack on the log file associated with the MALLOCDEBUG environment variable.

CVSS v3
—
EG Score
0.0(none)
EPSS
47.4%
KEV
Not listed

Published

May 26, 2009

Last Modified

April 23, 2026

References (34)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:23 UTCEPSS rescore
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  1. 2026-06-19 19:22 UTCEPSS rescore
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  36. 2026-05-30 16:45 UTCEG score recompute
  37. 2026-05-30 16:45 UTCGHSA enrichment
  38. 2026-05-29 13:40 UTCEPSS rescore
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  42. 2026-05-27 13:38 UTCEPSS rescore
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  44. 2026-05-26 13:41 UTCEPSS rescore
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  46. 2026-05-26 07:16 UTCEPSS rescore
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  48. 2026-05-24 16:43 UTCEPSS rescore
  49. 2026-05-22 21:15 UTCEPSS rescore
  50. 2026-05-22 21:15 UTCEPSS rescore
  51. 2026-05-20 22:37 UTCEPSS rescore
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  53. 2026-05-20 11:21 UTCEPSS rescore
  54. 2026-05-20 11:20 UTCEPSS rescore
  55. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-33001✓ verified
    First seen May 20, 2009

    Kingsoft Webshield 1.1.0.62 - Cross-Site Scripting / Remote Command Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2009-1786?
CVE-2009-1786 is a none vulnerability published on May 26, 2009. The malloc subsystem in libc in IBM AIX 5.3 and 6.1 allows local users to create or overwrite arbitrary files via a symlink attack on the log file associated with the MALLOCDEBUG environment variable.
When was CVE-2009-1786 disclosed?
CVE-2009-1786 was first published in the National Vulnerability Database on May 26, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-1786 actively exploited?
CVE-2009-1786 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2009-1786?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-1786, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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