CVE-2008-4788 — Microsoft Internet Explorer 6 omits high-bit URL-encoded characters when displaying the address bar, which allows remote attackers to spoof the address bar via a URL with a domain name that differs from an important domain name only in these characters, as demonstrated by using exam%A9ple.com to spoof example.com, aka MSRC ticket MSRC7900

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MEDIUM

Microsoft Internet Explorer 6 omits high-bit URL-encoded characters when displaying the address bar, which allows remote attackers to spoof the address bar via a URL with a domain name that differs from an important domain name only in these characters, as demonstrated by using exam%A9ple.com to spoof example.com, aka MSRC ticket MSRC7900

Published Oct 29, 2008

5.0

MEDIUM

CVSS 2.0

EPSS 9.06%

Description

Microsoft Internet Explorer 6 omits high-bit URL-encoded characters when displaying the address bar, which allows remote attackers to spoof the address bar via a URL with a domain name that differs from an important domain name only in these characters, as demonstrated by using exam%A9ple.com to spoof example.com, aka MSRC ticket MSRC7900.

Affected products

Remediation

No remediation recorded yet.

Metrics

9.06% 0.09061

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.

EPSS probability 0.09061

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (12 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 2, 2026	9.06% (0.09061)	95.15th	v5 (v2026.06.15)
Jun 15, 2026	9.06% (0.09061)	94.61th	v5 (v2026.06.15)
Mar 30, 2025	16.48% (0.16475)	94.32th	v4 (v2025.03.14)
Mar 29, 2025	31.05% (0.31050)	94.88th	v4 (v2025.03.14)
Mar 19, 2025	16.48% (0.16475)	94.09th	v4 (v2025.03.14)
Mar 17, 2025	13.87% (0.13868)	93.78th	v4 (v2025.03.14)
Dec 12, 2024	0.51% (0.00507)	77.29th	v3 (v2023.03.01)
Feb 8, 2024	0.50% (0.00495)	75.51th	v3 (v2023.03.01)
Mar 7, 2023	0.50% (0.00495)	72.52th	v3 (v2023.03.01)
Mar 6, 2023	11.68% (0.11676)	95.15th	v2 (v2022.01.01)
Apr 1, 2022	11.68% (0.11676)	94.76th	v2 (v2022.01.01)
Feb 4, 2022	11.68% (0.11676)	88.93th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (3)

http://www.securityfocus.com/archive/1/497825/100/0/threaded
mailing-listx_refsource_BUGTRAQ
http://www.securityfocus.com/archive/1/497827/100/0/threaded
mailing-listx_refsource_BUGTRAQ
https://exchange.xforce.ibmcloud.com/vulnerabilities/46235
vdb-entryx_refsource_XF

Link	Providers	Tags
http://www.securityfocus.com/archive/1/497825/100/0/threaded		mailing-listx_refsource_BUGTRAQ
http://www.securityfocus.com/archive/1/497827/100/0/threaded		mailing-listx_refsource_BUGTRAQ
https://exchange.xforce.ibmcloud.com/vulnerabilities/46235		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Oct 29, 2008

Updated Aug 7, 2024

Reserved Oct 29, 2008

Link CVE-2008-4788

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2008-4788

Red Hat

Severity n/a

Public date n/a

Links CVE-2008-4788