CVE-2021-42640

Q: How do I fix CVE-2021-42640?

Upgrade web stack to 19.1.1.13 or later.

Q: Is CVE-2021-42640 being actively exploited?

Not that we know of. CVE-2021-42640 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 79% of all scored CVEs.

Q: How severe is CVE-2021-42640?

CVE-2021-42640 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2021-42640 affect?

Published advisories record a fix for web stack (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICALEPSS 79th pctl

9.1

CVSS v3

NVD

Description

PrinterLogic Web Stack versions 19.1.1.13 SP9 and below are vulnerable to an Insecure Direct Object Reference (IDOR) vulnerability that allows an unauthenticated attacker to reassign drivers for any printer.

CWE-668

How to fix

Remediation Available

web stackNVD

Affected:< 19.1.1.13Fixed in:19.1.1.13CVE-2021-42640derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

2.03%probability of exploitation in 30 days

79thpercentile

Elevated risk: more likely to be exploited than 79% of all known CVEs.

References

Exploit1

yahooinc.com

Vendor Advisory1

printerlogic.com

Third-Party Advisory4

Related Vulnerabilities

Other CWE-668 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-39952	Critical	9.8	100%	-	Fix
CVE-2017-16597	Critical	9.8	57%	-	-
CVE-2017-16603	High	8.8	54%	-	-
CVE-2024-25153	Critical	9.8	42%	-	Fix
CVE-2022-25236	Critical	9.8	36%	-	Fix
CVE-2017-0215	Medium	5.3	36%	-	-

Common questions

How do I fix CVE-2021-42640?

Upgrade web stack to 19.1.1.13 or later.

Is CVE-2021-42640 being actively exploited?

Not that we know of. CVE-2021-42640 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 79% of all scored CVEs.

How severe is CVE-2021-42640?

CVE-2021-42640 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-42640 affect?

Published advisories record a fix for web stack (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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 2026-07-09.