SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2015-2504

Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2, and 4.6 improperly counts objects before performing an array copy, which allows remote attackers to (1) execute arbitrary code via a crafted XAML browser application (XBAP) or (2)…

HIGH 9.3EPSS 21.0%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 21.0%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.

Description

Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2, and 4.6 improperly counts objects before performing an array copy, which allows remote attackers to (1) execute arbitrary code via a crafted XAML browser application (XBAP) or (2) bypass Code Access Security restrictions via a crafted .NET Framework application, aka ".NET Elevation of Privilege Vulnerability."

CVSS 2.0
9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS
21.02% probability · 98th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-119
Affected
microsoft/.net framework
Source
secure@microsoft.com
EPSS trend
0%13%25%4 November 2026: 21.02%4 November 20264 November 2026

EPSS 21.0% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.