CVE Tools
Sign in

CVE-2006-0459

Published: Mar 29, 2006Updated: Apr 16, 2026 Sources: CVE List NVDCWE-119
7.5HIGH
NVD MITRE
EPSS Score
4.8%
Top 9.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

flex.skl in Will Estes and John Millaway Fast Lexical Analyzer Generator (flex) before 2.5.33 does not allocate enough memory for grammars containing (1) REJECT statements or (2) trailing context rules, which causes flex to generate code that contains a buffer overflow that might allow context-dependent attackers to execute arbitrary code.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LAu:NC:PI:PA:P
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Au:NAuthentication
None
Impact
C:PConfidentiality
Partial
I:PIntegrity
Partial
A:PAvailability
Partial
Open in CVSS calculator →

Weaknesses

CWE-119

Affected Products

westes
commercial
flexMixed
Web & CMS Plugins / cms-core
and 1 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2006-0459?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

http://prdownloads.sourceforge.net/flex/flex-2.5.33.tar.bz2?download
prdownloads.sourceforge.net
http://secunia.com/advisories/19071
secunia.com
http://secunia.com/advisories/19126
secunia.com
and 11 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2006-0459 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows