CVE-1999-1257

NONECVSS 0.0

0.0

Xyplex terminal server 6.0.1S1, and possibly other versions, allows remote attackers to bypass the password prompt by entering (1) a CTRL-Z character, or (2) a ? (question mark).

CVSS v3: —
EG Score: —
EPSS: 57.8%
KEV: Not listed

Published

November 26, 1997

Last Modified

April 16, 2026

References (6)

cve@mitrehttp://www.securityfocus.com/archive/1/8134
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/1825
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/1826
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/8134
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/1825
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/1826

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
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Frequently asked(4)

What is CVE-1999-1257?

CVE-1999-1257 is a none vulnerability published on November 26, 1997. Xyplex terminal server 6.0.1S1, and possibly other versions, allows remote attackers to bypass the password prompt by entering (1) a CTRL-Z character, or (2) a ? (question mark).

When was CVE-1999-1257 disclosed?

CVE-1999-1257 was first published in the National Vulnerability Database on November 26, 1997, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-1999-1257 actively exploited?

CVE-1999-1257 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-1257?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-1257, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-1999-1257

📅 Published

🔄 Last Modified

🔗 References (6)