Is CVE-2013-2551 in the CISA KEV catalog?

Yes. CVE-2013-2551 is on the CISA Known Exploited Vulnerabilities list, added 2022-03-28, and has known ransomware campaign use.

What is the CVSS severity of CVE-2013-2551?

CVE-2013-2551 has a CVSS v3 base score of 8.8 (HIGH).

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

CVE-2013-2551 has an EPSS score of 74.10% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2013-2551?

No published fix for CVE-2013-2551 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2022-04-18. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2013-2551

HIGHCISA KEVEPSS 99th pctl

8.8

CVSS v3

NVD

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.

CWE-416Use After Free

How to fix

Actively exploited, no published fix found yet

CISA required action: Apply updates per vendor instructions.

Federal remediation due: 2022-04-18

Known ransomware campaign use

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

74.10%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Microsoft Internet Explorer Use-After-Free Vulnerability

Use-after-free vulnerability in Microsoft Internet Explorer allows remote attackers to execute remote code via a crafted web site that triggers access to a deleted object.

Apply updates per vendor instructions.

Remediation due: 2022-04-18

Associated with ransomware campaigns

References

Patch1

docs.microsoft.com

Third-Party Advisory2

Government Resource1

cisa.gov

Other references3

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-21.