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CVE-2021-42635

31
FAUCET Score

CVE-2021-42635 is a critical pre-authentication remote code execution vulnerability affecting PrinterLogic Web Stack versions 19.1.1.13 SP9 and below, stemming from the use of a hardcoded APP_KEY value. With a CVSS score of 8.1 (High), this flaw is network-exploitable with high impact on confidentiality, integrity, and availability, but requires high attack complexity. Although it has a high FAUCET Risk Score of 91/100 and an elevated EPSS score, there is no evidence of active exploitation, nor are public exploits (Metasploit, Nuclei, ExploitDB) currently available. Despite this, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
< 19.1.1.13CPE matchmatch criteria
cpe:2.3:a:printerlogic:web_stack:*:*:*:*:*:*:*:*
19.1.1.13CPE matchmatch criteria
cpe:2.3:a:printerlogic:web_stack:19.1.1.13:-:*:*:*:*:*:*
19.1.1.13CPE matchmatch criteria
cpe:2.3:a:printerlogic:web_stack:19.1.1.13:sp2:*:*:*:*:*:*
19.1.1.13CPE matchmatch criteria
cpe:2.3:a:printerlogic:web_stack:19.1.1.13:sp3-3:*:*:*:*:*:*
19.1.1.13CPE matchmatch criteria
cpe:2.3:a:printerlogic:web_stack:19.1.1.13:sp9:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.52%
Probability of exploitation in next 30 days
EPSS Percentile
92.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0552 is in the 62nd percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

portswigger.net / daily-swig/printerlogic-vendor-addresses-triple-rce-threat-against-all-connected-endpoints
Press/Media CoverageThird Party Advisory
securityaffairs.co / wordpress/127194/security/printerlogic-printer-management-suite-flaws.html
Third Party Advisory
thecyberthrone.in / 2022/01/26/printerlogic-%F0%9F%96%A8-fixes-critical-vulnerabilities-in-its-suite
Press/Media CoverageThird Party Advisory
printerlogic.com / security-bulletin
Vendor Advisory
securityweek.com / printerlogic-patches-code-execution-flaws-printer-management-suite
Press/Media CoverageThird Party Advisory
yahooinc.com / paranoids/paranoids-vulnerability-research-printerlogic-issues-security-alert
ExploitPress/Media CoverageThird Party Advisory