LiveActive security incident?Get immediate response
CVE Record

CVE-1999-1228: Various modems that do not implement a guard time, or are configured with a guard time of 0, can allow remo...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This is a legacy dial-up modem issue. Some modems may treat normal network or message content as modem commands when guard-time protection is missing or disabled. The practical result is likely unexpected modem behavior, such as dropped connections, rather than broad modern enterprise compromise. Exposure is mainly organizations still using analog modems, dial-up remote access, legacy out-of-band management, or older embedded environments. Modern internet-facing applications are unlikely to be directly affected based on the provided sources. Low priority for most modern environments, but higher where legacy modem access supports operations, remote maintenance, or critical systems. The main business concern is hidden legacy connectivity and availability impact. Mitigation focus: Inventory any active analog or dial-up modem use.; Check modem configuration for guard-time or escape-sequence protections.; Disable unused modem lines and dial-up access paths..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-1999-1228 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.