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Fencer Vulns
medium 5.0

CVE-2001-0740 json

3COM OfficeConnect 812 and 840 ADSL Router 4.2, running OCR812 router software 1.1.9 and earlier, allows remote attackers to cause a denial…

published 2001-10-18 25 y ago modified 2026-06-16 4 mo ago also EUVD-2001-0725

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.1%
EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits
1
Exploit-DB

Summary

3COM OfficeConnect 812 and 840 ADSL Router 4.2, running OCR812 router software 1.1.9 and earlier, allows remote attackers to cause a denial of service via a long string containing a large number of "%s" strings, possibly triggering a format string vulnerability.

Patch / fix

Timeline

  1. First public exploit (EDB-20847)
  2. Published

Exploit prediction

4.05% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-20847 3Com OfficeConnect DSL Router 812 1.1.7/840 1.1.7 - HTTP Port Router Denial of Service dos, 2001-09-21
  • securityfocus.com http://www.securityfocus.com/bid/2721 referenced PoC, tagged "exploit" by a source, unverified
  • archives.neohapsis.com http://archives.neohapsis.com/archives/bugtraq/2001-05/0115.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

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.