CVE-1999-1357: Netscape Communicator 4.04 through 4.7 (and possibly other versions) in various UNIX operating systems converts the 0x8b
Summary
Netscape Communicator 4.04 through 4.7 (and possibly other versions) in various UNIX operating systems converts the 0x8b character to a "<" sign, and the 0x9b character to a ">" sign, which could allow remote attackers to attack other clients via cross-site scripting (CSS) in CGI programs that do not filter these characters.
Why It Matters
UNKNOWN severity with CVSS n/a.
Current Status
- Vulnerability status: Not listed in CISA KEV
- Last intelligence update: 2026-08-21 · source: NVD
Entity Activity Timeline
- 2026-08-21 — Intelligence record updated（NVD sync）
Severity
UNKNOWN
Source Attribution
Source: NVD · Updated: 2026-08-21T04:30:49.687Z · Confidence: high
Impact
Based on CVSS vector: n/a — assess confidentiality, integrity, and availability impact via the official vector documentation.
Affected Software
Fix
Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.
Sources & Evidence
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- Evidence — assertions mapped to verifiable references.
- Timeline — events in chronological order.
- Related Entities — CVE, threat actor, campaign, malware links.
- Sources — NVD, CISA KEV, MITRE ATT&CK, vendor advisories.
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