Is CVE-2021-42260 in the CISA KEV catalog?

No. CVE-2021-42260 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42260?

CVE-2021-42260 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-42260?

CVE-2021-42260 has an EPSS score of 3.06% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42260?

Upgrade tinyxml on debian 11 to 2.6.2-4+deb11u1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-42260

HIGHEPSS 86th pctl

7.5

CVSS v3

NVD

Description

TinyXML through 2.6.2 has an infinite loop in TiXmlParsingData::Stamp in tinyxmlparser.cpp via the TIXML_UTF_LEAD_0 case. It can be triggered by a crafted XML message and leads to a denial of service.

CWE-835

How to fix

Remediation Available

tinyxmlDebian

Fixed in:2.6.2-4+deb11u1CVE-2021-42260

Fixed in:2.6.2-6CVE-2021-42260

libtinyxml-devUbuntu

Fixed in:2.6.2-3ubuntu0.1~esm1USN-6542-1

Fixed in:2.6.2-4ubuntu0.18.04.1~esm1USN-6542-1

Fixed in:2.6.2-4+deb10u1build0.20.04.1USN-6542-1

libtinyxml2.6.2v5Ubuntu

Fixed in:2.6.2-3ubuntu0.1~esm1USN-6542-1

Fixed in:2.6.2-4ubuntu0.18.04.1~esm1USN-6542-1

Fixed in:2.6.2-4+deb10u1build0.20.04.1USN-6542-1

tinyxmlUbuntu

Fixed in:2.6.2-3ubuntu0.1~esm1USN-6542-1

Fixed in:2.6.2-4ubuntu0.18.04.1~esm1USN-6542-1

Fixed in:2.6.2-4+deb10u1build0.20.04.1USN-6542-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

3.06%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Exploit1

sourceforge.net

Third-Party Advisory2

Other references4

Related Vulnerabilities

Other CWE-835 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13935	High	7.5	88%	-	Fix
CVE-2020-36227	High	7.5	78%	-	Fix
CVE-2022-0778	High	7.5	71%	-	Fix
CVE-2019-14241	High	7.5	70%	-	-
CVE-2017-16944	High	7.5	63%	-	Fix
CVE-2024-20353	High	8.6	63%	KEV	-

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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 2025-11-04.