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Fencer Vulns
medium 5.0

CVE-1999-0193 json

Denial of service in Ascend and 3com routers, which can be rebooted by sending a zero length TCP option.

published 1997-12-01 28 y ago modified 2026-06-16 4 mo ago also EUVD-1999-0193

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.9%
EPSS 4.9% chance of exploitation in 30 days, percentile 92%
public exploits
2
Exploit-DB

Summary

Denial of service in Ascend and 3com routers, which can be rebooted by sending a zero length TCP option.

Timeline

  1. Published
  2. First public exploit (EDB-20331)

Exploit prediction

4.89% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-20332 Ascend R 4.5 Ci12 - Denial of Service dos, 1998-03-17
  • EDB-20331 Ascend R 4.5 Ci12 - Denial of Service dos, 1998-03-16

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.