How severe is CVE-2013-2551?

CVE-2013-2551 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2013-2551?

Affected package information for CVE-2013-2551 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2013-2551?

No fixed version has been published for CVE-2013-2551 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2013-2551 actively exploited in the wild?

Yes. There are 3 known exploit references for CVE-2013-2551, including 1 documented proof-of-concept exploit on Exploit-DB and 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2013-2551?

CVE-2013-2551 has an EPSS (Exploit Prediction Scoring System) score of 92.4%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2013-2551 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2013-2551 (Microsoft Internet Explorer Use-After-Free Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-03-28. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-04-18. The required action was: Apply updates per vendor instructions. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2013-2551?

CVE-2013-2551 is classified as Use After Free (CWE-416). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2013-2551?

CVE-2013-2551 affects microsoft internet explorer (5 versions, e.g. 6, 7, 8…). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2013-2551 published, and has it been updated?

CVE-2013-2551 was published on March 11, 2013 and was last updated on April 21, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2022-03-28 — agencies required to remediate by 2022-04-18 · Ransomware

CVE-2013-2551

HIGH

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object,…

Published

Mar 11, 2013

Updated

Apr 21, 2026

Affected

0 pkgs

Patched

None yet

Exploits

3 known

EPSS Exploitation Probability

via FIRST.org ↗

92.4%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, as demonstrated by VUPEN during a Pwn2Own competition at CanSecWest 2013, aka "Internet Explorer Use After Free Vulnerability," a different vulnerability than CVE-2013-1308 and CVE-2013-1309.

Affected Products

1 product · 5 configurations

Application

internet explorermicrosoft

5 versions

678910

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-26175remotewindows✓ Verified

Microsoft Internet Explorer - COALineDashStyleArray Integer Overflow (MS13-009) (Metasploit)

by Metasploit · Jun 13, 2013

Exploit-DB Source

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2013-2551 in your stack?

O3 detects CVE-2013-2551 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works

CVSS Score

8.8/10

CVSS v3 base score

Vector breakdown

AV:Attack Vector

Network

AC:Attack Complexity

Low

PR:Privileges Required

None

UI:User Interaction

Required

S:Scope

Unchanged

C:Confidentiality

High

I:Integrity

High

A:Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE Classification

CWE-416Use After Free

Weaponization

No known public exploit tooling found.

Timeline

Disclosed

Mar 11, 2013

First exploit

Jun 13, 2013

KEV added

Mar 28, 2022

Last updated

Apr 21, 2026

Identifiers

CVE-2013-2551

References

Advisoryh30499.www3.hp.com Advisoryus-cert.gov Advisoryh30499.www3.hp.com Advisoryus-cert.gov Fixdocs.microsoft.com Fixdocs.microsoft.com Webtwitter.com Webtwitter.com Weboval.cisecurity.org Webtwitter.com Webtwitter.com Weboval.cisecurity.org Webcisa.gov

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