CVE-2021-42260

mediumpriority · track · 41EPSS 0.034 · 89 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

3.38% (89th) EPSS

CVSS 5 · medium

Is it mine?

81 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCompact GuardLogix 5380cisa_csaf_ot
Rockwell Automation recommends users update to firmware version 34.015 and later.
FixedCompactLogix 5380cisa_csaf_ot
Rockwell Automation recommends users update to firmware version 34.015 and later.
FixedCompactLogix 5480cisa_csaf_ot
Rockwell Automation recommends users update to firmware version 34.015 and later.
FixedControlLogix 5580cisa_csaf_ot
Rockwell Automation recommends users update to firmware version 34.015 and later.
FixedGuardLogix 5580cisa_csaf_ot
Rockwell Automation recommends users update to firmware version 34.015 and later.
MitigationCompact GuardLogix 5380cisa_csaf_ot
Customers using the affected software who are not able to upgrade to one of the corrected versions should use Rockwell Automation's security best practices.
MitigationCompactLogix 5380cisa_csaf_ot
Customers using the affected software who are not able to upgrade to one of the corrected versions should use Rockwell Automation's security best practices.
MitigationCompactLogix 5480cisa_csaf_ot
Customers using the affected software who are not able to upgrade to one of the corrected versions should use Rockwell Automation's security best practices.
MitigationControlLogix 5580cisa_csaf_ot
Customers using the affected software who are not able to upgrade to one of the corrected versions should use Rockwell Automation's security best practices.
MitigationGuardLogix 5580cisa_csaf_ot
Customers using the affected software who are not able to upgrade to one of the corrected versions should use Rockwell Automation's security best practices.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-835USprimaryCWE-835USCWE-835US

exploits (1)

Public proof-of-concept and weaponised exploit code.

vm2mv/tinyxmlTinyXML 2.6.2 with fixes for CVE-2021-42260 and CVE-2023-34194PoC · poc_in_github

affected products (81)

Products and version ranges known to be affected.

Rockwell Automation CompactLogix 5380 <34.015all versionscert_bundDE
Rockwell Automation CompactLogix 5380 <35.014all versionscert_bundDE
Rockwell Automation CompactLogix 5380 <36.013all versionscert_bundDE
Rockwell Automation CompactLogix 5380 <37.011all versionscert_bundDE
Rockwell Automation CompactLogix 5480 <34.015all versionscert_bundDE
Rockwell Automation CompactLogix 5480 <35.014all versionscert_bundDE
Rockwell Automation CompactLogix 5480 <36.013all versionscert_bundDE
Rockwell Automation CompactLogix 5480 <37.011all versionscert_bundDE
Rockwell Automation ControlLogix 5580 <34.015all versionscert_bundDE
Rockwell Automation ControlLogix 5580 <35.014all versionscert_bundDE
Rockwell Automation ControlLogix 5580 <36.013all versionscert_bundDE
Rockwell Automation ControlLogix 5580 <37.011all versionscert_bundDE
Rockwell Automation CompactLogix≤ 5380 <34.015cert_bundDE
Rockwell Automation CompactLogix≤ 5380 <35.014cert_bundDE
Rockwell Automation CompactLogix≤ 5380 <36.013cert_bundDE
Rockwell Automation CompactLogix≤ 5380 <37.011cert_bundDE
Rockwell Automation CompactLogix≤ 5480 <34.015cert_bundDE
Rockwell Automation CompactLogix≤ 5480 <35.014cert_bundDE
Rockwell Automation CompactLogix≤ 5480 <36.013cert_bundDE
Rockwell Automation CompactLogix≤ 5480 <37.011cert_bundDE

showing 20 of 81

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3142Rockwell Automation ControlLogix 5580, CompactLogix 5380, und CompactLogix 5480: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2026-09-01csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Rockwell Automation ControlLogix und Rockwell Automation CompactLogix ausnutzen, um einen Denial of Service Angriff durchzuführen.
ICSA-26-244-05Rockwell Automation ControlLogix, CompactLogix, CompactLogix 5480, GuardLogix, Compact GuardLogix2026-09-01icsa · cisa_csaf_otUS
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund cisa_csaf_ot NVD CVE.org MITRE

published 2021-10-11modified 2026-06-17

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references (18)

External citations — patches, advisories, analysis.

scry

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