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UK Cyber Defence
VulnerabilityAnalyzed

CVE-2013-3163

Microsoft Internet Explorer Memory Corruption Vulnerability

KEVEXPLOIT ✓HIGH 8.8EPSS 70.7%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 20 April 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

Description

Microsoft Internet Explorer 8 through 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability," a different vulnerability than CVE-2013-3144 and CVE-2013-3151.

CVSS 3.1
8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
70.68% probability · 99th percentile
Public exploits
1 in Exploit-DB · verified · first 10 September 2013
CISA KEV
Listed 30 March 2023 · due 20 April 2023
Weakness
CWE-787
Affected
microsoft/internet explorer
Source
secure@microsoft.com
EPSS trend
0%38%75%30 October 2026: 70.68%30 October 202630 October 2026

EPSS 70.7% since 30 October 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.

CISA notes

The impacted product is end-of-life and should be disconnected if still in use. https://learn.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-055; https://nvd.nist.gov/vuln/detail/CVE-2013-3163

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-28187source ↗Microsoft Internet Explorer - CAnchorElement Use-After-Free (MS13-055) (Metasploit)windows · Metasploitremote10 September 2013yes

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