Internet Explorer 5 allows remote attackers to read files via an ExecCommand method called on an IFRAME.

published 1999-10-01 27 y ago modified 2026-06-16 4 mo ago also EUVD-1999-0858

cvss: 4.3; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 17.7%; EPSS 17.7% chance of exploitation in 30 days, percentile 97%
public exploits: 1; Exploit-DB

Timeline

1999-10-01 Published
1999-10-11 First public exploit (EDB-19539)

Exploit prediction

17.67% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-19539 Microsoft Internet Explorer 5.0/4.0.1 - iFrame remote, 1999-10-11

CVSS scores

assigned by	version	score	vector
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

support.microsoft.com /default.aspx?scid=kb%3B%5BLN%5D%3BQ243638
vendor-advisory
docs.microsoft.com /en-us/security-updates/securitybulletins/1999/ms99-042
vendor-advisory

Sources

CVE List CVE-1999-0877
NVD CVE-1999-0877

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary