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Fencer Vulns
critical 9.3

CVE-2009-0812 json

Stack-based buffer overflow in BreakPoint Software Hex Workshop 4.23, 6.0.1.4603, and other 6.x and earlier versions allows remote attacker…

published 2009-03-04 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-0810

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.9%
EPSS 6.9% chance of exploitation in 30 days, percentile 94%
public exploits
2
Exploit-DB

Summary

Stack-based buffer overflow in BreakPoint Software Hex Workshop 4.23, 6.0.1.4603, and other 6.x and earlier versions allows remote attackers to execute arbitrary code via a crafted Intel Hex Code (.hex) file. NOTE: some of these details are obtained from third party information.

Timeline

  1. First public exploit (EDB-8121)
  2. Published

Exploit prediction

6.90% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-9550 Hex Workshop 4.23/5.1/6.0 - '.hex' Universal Local Buffer Overflow (SEH) local, 2009-08-31
  • EDB-8121 Hex Workshop 6.0 - '.hex' Local Code Execution local, 2009-02-27
  • securityfocus.com http://www.securityfocus.com/bid/33932 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.