Various modems that do not implement a guard time, or are configured with a guard time of…
Priority LOW 37Published · Updated
Key facts
- Attack vector
- Network
- 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
Various modems that do not implement a guard time, or are configured with a guard time of 0, can allow remote attackers to execute arbitrary modem commands such as ATH, ATH0, etc., via a "+++" sequence that appears in ICMP packets, the subject of an e-mail message, IRC commands, and others.
Why it matters now
EPSS 0.01909 79th percentileScored 2026-11-07
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 · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:logicode:quicktel:28.8:*:*:*:*:*:*:* | 28.8 | Vulnerable | Logicode |
| cpe:2.3:h:diamond:supra:33.6:*:*:*:*:*:*:* | 33.6 | Vulnerable | Diamond |
| cpe:2.3:h:diamond:supra:v.90:*:*:*:*:*:*:* | v.90 | Vulnerable | Diamond |
| cpe:2.3:h:us_robotics:us_robotics:33.6:*:*:*:*:*:*:* | 33.6 | Vulnerable | Us Robotics |
- cpe:2.3:a:logicode:quicktel:28.8:*:*:*:*:*:*:* Versions 28.8 Vulnerable ·Logicode
- cpe:2.3:h:diamond:supra:33.6:*:*:*:*:*:*:* Versions 33.6 Vulnerable ·Diamond
- cpe:2.3:h:diamond:supra:v.90:*:*:*:*:*:*:* Versions v.90 Vulnerable ·Diamond
- cpe:2.3:h:us_robotics:us_robotics:33.6:*:*:*:*:*:*:* Versions 33.6 Vulnerable ·Us Robotics
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-1999-1228
- 2026-10-03 Alias added: GHSA-xqv9-mm7j-xwfh
References
Sources
- CVE-1999-1228 · CVE Program
- CVE-1999-1228 · NVD
- FIRST EPSS
- GHSA-xqv9-mm7j-xwfh · 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