How severe is CVE-2021-42640?

CVE-2021-42640 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-42640 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42640?

CVE-2021-42640 primarily affects Printerlogic Web Stack. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-42640?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-42640 published?

CVE-2021-42640 was published on 2022-02-02 and last updated on 2026-07-05.

CVE-2021-42640

CVE-2021-42640 is a critical-severity vulnerability in Printerlogic Web Stack with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-668.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-668
Affected product: Printerlogic Web Stack
Published: 2022-02-02
Last modified: 2026-07-05

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.

Frequently asked questions

What is CVE-2021-42640?: 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.
How severe is CVE-2021-42640?: CVE-2021-42640 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-42640 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42640?: CVE-2021-42640 primarily affects Printerlogic Web Stack. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-42640?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-42640 published?: CVE-2021-42640 was published on 2022-02-02 and last updated on 2026-07-05.

References

Affected products (5)

cpe:2.3:a:printerlogic:web_stack:*:*:*:*:*:*:*:*
cpe:2.3:a:printerlogic:web_stack:19.1.1.13:-:*:*:*:*:*:*
cpe:2.3:a:printerlogic:web_stack:19.1.1.13:sp2:*:*:*:*:*:*
cpe:2.3:a:printerlogic:web_stack:19.1.1.13:sp3-3:*:*:*:*:*:*
cpe:2.3:a:printerlogic:web_stack:19.1.1.13:sp9:*:*:*:*:*:*

More vulnerabilities in Printerlogic Web Stack

CVE-2021-42637 — Critical (CVSS 9.8): PrinterLogic Web Stack versions 19.1.1.13 SP9 and below use user-controlled input to craft a URL, resulting in a Server…
CVE-2021-42638 — High (CVSS 8.1): PrinterLogic Web Stack versions 19.1.1.13 SP9 and below do not sanitize user input resulting in pre-auth remote code…
CVE-2021-42635 — High (CVSS 8.1): PrinterLogic Web Stack versions 19.1.1.13 SP9 and below use a hardcoded APP_KEY value, leading to pre-auth remote code…
CVE-2021-42631 — High (CVSS 8.1): PrinterLogic Web Stack versions 19.1.1.13 SP9 and below deserializes attacker controlled leading to pre-auth remote…
CVE-2021-42642 — High (CVSS 7.5): PrinterLogic Web Stack versions 19.1.1.13 SP9 and below are vulnerable to an Insecure Direct Object Reference (IDOR)…
CVE-2021-42641 — High (CVSS 7.5): PrinterLogic Web Stack versions 19.1.1.13 SP9 and below are vulnerable to an Insecure Direct Object Reference (IDOR)…

All CVEs affecting Printerlogic Web Stack →

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