What is CVE-1999-0802?

CVE-1999-0802 is a vulnerability in Microsoft Internet Explorer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 1999-05-27.

Is CVE-1999-0802 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Microsoft Internet Explorer

CVE-1999-0802

Buffer overflow in Internet Explorer 5 allows remote attackers to execute commands via a malformed Favorites icon.

Vulnerability class: Buffer Overflow

Published 1999-05-27 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 7.6 (High). Vector: AV:N/AC:H/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.102 (95.5th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.102 · newest: 0.102 · change: 0.000

Affected products

Microsoft Internet Explorer — versions 5.0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-018 (vendor-advisory)
support.microsoft.com/default.aspx (vendor-advisory)

Frequently asked questions

What is CVE-1999-0802?: CVE-1999-0802 is a vulnerability in Microsoft Internet Explorer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 1999-05-27.
Is CVE-1999-0802 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.