ExploitedIn CISA KEVFix available

CVE-2013-2551

Exploitation confirmed. First attested on 2022-03-28 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2013-03-11
WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2013-03-1110:55CVE publishedNVD
2022-03-28Added to the CISA KEV catalogCISA KEV
2022-03-28Listed as exploited by GCVEGCVE
2022-03-28Exploitation first reportedCISA KEV
2025-02-0714:13SSVC exploitation set to activeCISA-ADP
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2013-2551?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2013-2551?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft internet explorerversion to verify

Branch	Affected	Fixed in	Source
6.x	= 6	no fix published	NVD
7.x	= 7	no fix published	NVD
8.x	= 8	no fix published	NVD
9.x	= 9	no fix published	NVD
10.x	= 10	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

CISA’s required action: Apply updates per vendor instructions.due 2022-04-18

Advisories and patches

docs.microsoft.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

CISA Known Exploited Vulnerability

Date Added: 2022-03-28
Patch Due Date: 2022-04-18
Ransomware Use: Known
Required Action: Apply updates per vendor instructions.

Sources

CISA KEVKEV entry2022-03-28
GCVEexploitation2022-03-28
CISA-ADPSSVC decisionactive2025-02-07
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.18.82025-02-07
NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.09.3read 2026-10-23
CISA-ADPweakness (CWE)CWE-4162025-02-07
NVDweakness (CWE)CWE-416read 2026-10-23
FIRST EPSSEPSS score73.9 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2013-03-11
Last Modified: 2026-06-16
NVD status: Analyzed

Frequently asked questions

What is CVE-2013-2551?

Is CVE-2013-2551 actively exploited?

Yes. CVE-2013-2551 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-04-18.

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

CVE-2013-2551 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, March 2022 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

For a threat intelligence platform: malware, C2 and ransomware indicators over STIX/TAXII.
Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database