How severe is CVE-2008-5828?

CVE-2008-5828 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-5828 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-5828?

CVE-2008-5828 primarily affects Microsoft Windows Live Messenger. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-5828?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-5828 published?

CVE-2008-5828 was published on 2009-01-02 and last updated on 2026-06-16.

CVE-2008-5828

CVE-2008-5828 is a medium-severity vulnerability in Microsoft Windows Live Messenger with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Microsoft Windows Live Messenger
Published: 2009-01-02
Last modified: 2026-06-16

Description

Microsoft Windows Live Messenger Client 8.5.1 and earlier, when MSN Protocol Version 15 (MSNP15) is used over a NAT session, allows remote attackers to discover intranet IP addresses and port numbers by reading the (1) IPv4InternalAddrsAndPorts, (2) IPv4Internal-Addrs, and (3) IPv4Internal-Port header fields.

Frequently asked questions

What is CVE-2008-5828?: Microsoft Windows Live Messenger Client 8.5.1 and earlier, when MSN Protocol Version 15 (MSNP15) is used over a NAT session, allows remote attackers to discover intranet IP addresses and port numbers by reading the (1) IPv4InternalAddrsAndPorts, (2) IPv4Internal-Addrs, and (3) IPv4Internal-Port header fields.
How severe is CVE-2008-5828?: CVE-2008-5828 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-5828 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5828?: CVE-2008-5828 primarily affects Microsoft Windows Live Messenger. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-5828?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-5828 published?: CVE-2008-5828 was published on 2009-01-02 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:microsoft:windows_live_messenger:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:windows_live_messenger:8.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:windows_live_messenger:8.1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:windows_live_messenger:8.5:*:*:*:*:*:*:*

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