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CVE-2021-42638
high
CVSS 8.1
Command Injection in printerlogic (CVE-2021-42638)
Summary
command injection in printerlogic (CVE-2021-42638). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2021-42638** has been found in printerlogic.
Successful exploitation can lead to full system takeover. CVSS score: 8.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "printerlogic CVE-2021-42638" on the vendor's site.
CVE-2021-42638 (printerlogic) — CWE-77 / CVSS v3 8.1
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**A vulnerability** (CWE-77) exists in printerlogic.
📍 Affected scope
printerlogic — .
🔥 Severity
Severity: High (CVSS 8.1/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'printerlogic' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'printerlogic' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `printerlogic` を grep し、稼働しているサービス・バージョンを把握する。
-
7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
References
- exploit af854a3a-2127-422b-91ae-364da2661108
- patch af854a3a-2127-422b-91ae-364da2661108
- web https://portswigger.net/daily-swig/printerlogic-vendor-addresses-triple-rce-threat-against-all-connected-endpoints
- web https://securityaffairs.co/wordpress/127194/security/printerlogic-printer-management-suite-flaws.html
- web 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
- web https://www.securityweek.com/printerlogic-patches-code-execution-flaws-printer-management-suite
- web http://printerlogic.com
- web https://nvd.nist.gov/vuln/detail/CVE-2021-42638
- web https://www.printerlogic.com/security-bulletin
- web https://www.yahooinc.com/paranoids/paranoids-vulnerability-research-printerlogic-issues-security-alert
- web https://github.com/advisories/GHSA-28cj-w6xw-4v98