Dallas Semiconductor iButton DS1991 returns predictable values when given an incorrect…
Priority LOW 22Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
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.
Why it matters now
EPSS 0.00471 40th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:dallas_semiconductor:ibutton:ds1991:*:*:*:*:*:*:* | ds1991 | Vulnerable | Dallas Semiconductor |
- cpe:2.3:h:dallas_semiconductor:ibutton:ds1991:*:*:*:*:*:*:* Versions ds1991 Vulnerable ·Dallas Semiconductor
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2001-1436
- 2026-10-03 Alias added: GHSA-g6p6-xc86-g98v
Sources
- CVE-2001-1436 · CVE Program
- CVE-2001-1436 · NVD
- FIRST EPSS
- GHSA-g6p6-xc86-g98v · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences