CVE-2010-1986 — Mozilla Firefox 3.6.3 on Windows XP SP3 allows remote attackers to cause a denial of service (memory consumption and application crash) via JavaScript code that creates multiple arrays containing elements with long string values, and then appends long strings to the content of a P element, related to the gfxWindowsFontGroup::MakeTextRun function in xul.dll, a different vulnerability than CVE-2009-1571

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MEDIUM

Mozilla Firefox 3.6.3 on Windows XP SP3 allows remote attackers to cause a denial of service (memory consumption and application crash) via JavaScript code that creates multiple arrays containing elements with long string values, and then appends long strings to the content of a P element, related to the gfxWindowsFontGroup::MakeTextRun function in xul.dll, a different vulnerability than CVE-2009-1571

Published May 20, 2010

5.0

MEDIUM

CVSS 2.0

EPSS 1.56%

Description

Mozilla Firefox 3.6.3 on Windows XP SP3 allows remote attackers to cause a denial of service (memory consumption and application crash) via JavaScript code that creates multiple arrays containing elements with long string values, and then appends long strings to the content of a P element, related to the gfxWindowsFontGroup::MakeTextRun function in xul.dll, a different vulnerability than CVE-2009-1571.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.56% 0.01562

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01562

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.56% (0.01562)	74.35th	v5 (v2026.06.15)
Jun 15, 2026	1.56% (0.01562)	71.94th	v5 (v2026.06.15)
Mar 17, 2025	1.29% (0.01288)	78.27th	v4 (v2025.03.14)
Dec 12, 2024	2.32% (0.02317)	90.11th	v3 (v2023.03.01)
Nov 29, 2023	2.32% (0.02317)	88.54th	v3 (v2023.03.01)
Mar 7, 2023	3.32% (0.03317)	89.81th	v3 (v2023.03.01)
Mar 6, 2023	1.32% (0.01319)	71.27th	v2 (v2022.01.01)
Feb 23, 2023	1.32% (0.01319)	71.23th	v2 (v2022.01.01)
Apr 1, 2022	1.32% (0.01319)	69.22th	v2 (v2022.01.01)
Feb 4, 2022	1.32% (0.01319)	44.98th	v2 (v2022.01.01)

Weaknesses (1)

CWE-399

References (6)

http://www.exploit-db.com/exploits/12678
exploitx_refsource_EXPLOIT-DB
http://www.osvdb.org/64791
vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/archive/1/511329/100/0/threaded
mailing-listx_refsource_BUGTRAQ
http://www.x90c.org/advisories/firefox_3.6.3_crash_advisory.txt
x_refsource_MISCExploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/58761
vdb-entryx_refsource_XF
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12433
vdb-entrysignaturex_refsource_OVAL

Link	Providers	Tags
http://www.exploit-db.com/exploits/12678		exploitx_refsource_EXPLOIT-DB
http://www.osvdb.org/64791		vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/archive/1/511329/100/0/threaded		mailing-listx_refsource_BUGTRAQ
http://www.x90c.org/advisories/firefox_3.6.3_crash_advisory.txt		x_refsource_MISCExploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/58761		vdb-entryx_refsource_XF
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12433		vdb-entrysignaturex_refsource_OVAL

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published May 20, 2010

Updated Aug 7, 2024

Reserved May 20, 2010

Link CVE-2010-1986

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2010-1986

Red Hat

Severity n/a

Public date n/a

Links CVE-2010-1986