CVE-2021-42631

Exp

PrinterLogic Web Stack versions 19.1.1.13 SP9 and below deserializes attacker controlled leading to pre-auth remote code execution.

Published: 2022-01-31 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-42631 is rated High Exploit Risk (80.2/100): CVSS High severity, with high exploitation likelihood (EPSS 6.32%, 93th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-42631

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-42631

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-22 5.92% 6.32% +0.39%
2 2026-06-15 20.57% 5.92% -14.65%
3 2025-03-30 — 20.57% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-42631

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2021-42631

Affected software / configurations for CVE-2021-42631

Vendor Product Version Raw CPE
printerlogic virtual_appliance <= 20.0.1304 cpe:2.3:a:printerlogic:virtual_appliance:*:*:*:*:*:*:*:*
printerlogic web_stack < 19.1.1.13 cpe:2.3:a:printerlogic:web_stack:*:*:*:*:*:*:*:*
printerlogic web_stack 19.1.1.13 cpe:2.3:a:printerlogic:web_stack:19.1.1.13:-:*:*:*:*:*:*
printerlogic web_stack 19.1.1.13 cpe:2.3:a:printerlogic:web_stack:19.1.1.13:sp2:*:*:*:*:*:*
printerlogic web_stack 19.1.1.13 cpe:2.3:a:printerlogic:web_stack:19.1.1.13:sp3-3:*:*:*:*:*:*
printerlogic web_stack 19.1.1.13 cpe:2.3:a:printerlogic:web_stack:19.1.1.13:sp9:*:*:*:*:*:*

References for CVE-2021-42631

URL Tags
http://printerlogic.com Vendor Advisory
https://portswigger.net/daily-swig/printerlogic-vendor-addresses-triple-rce-threat-against-all-connected-endpoints Press/Media Coverage Third Party Advisory
https://securityaffairs.co/wordpress/127194/security/printerlogic-printer-management-suite-flaws.html Third Party Advisory
https://thecyberthrone.in/2022/01/26/printerlogic-%F0%9F%96%A8-fixes-critical-vulnerabilities-in-its-suite/?utm_source=rss&utm_medium=rss&utm_campaign=printerlogic-%25f0%259f%2596%25a8-fixes-critical-vulnerabilities-in-its-suite Press/Media Coverage Third Party Advisory
https://www.printerlogic.com/security-bulletin/ Vendor Advisory
https://www.securityweek.com/printerlogic-patches-code-execution-flaws-printer-management-suite Press/Media Coverage Third Party Advisory
https://www.yahooinc.com/paranoids/paranoids-vulnerability-research-printerlogic-issues-security-alert/ Exploit Press/Media Coverage Third Party Advisory
cvelogic Threat Intelligence