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Fencer Vulns
medium 4.6

CVE-2001-1436 json

Dallas Semiconductor iButton DS1991 returns predictable values when given an incorrect password, which makes it easier for users with physi…

published 2001-01-18 25 y ago modified 2026-06-16 4 mo ago also EUVD-2001-1416

cvss
4.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

Dallas Semiconductor iButton DS1991 returns predictable values when given an incorrect password, which makes it easier for users with physical access to conduct dictionary attacks against the device password.

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • atstake.com http://www.atstake.com/research/advisories/2001/a011801-1.txt referenced PoC, tagged "exploit" by a source, unverified
  • kb.cert.org http://www.kb.cert.org/vuls/id/178560 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/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.