{"vulnerability": "CVE-2021-2187", "sightings": [{"uuid": "746edbc8-44e8-4d8a-86a6-fadda1b5b96a", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21875", "type": "seen", "source": "https://t.me/cibsecurity/34544", "content": "\u203c CVE-2021-21875 \u203c\n\nA specially-crafted HTTP request can lead to arbitrary command execution in EC keypasswd parameter. An attacker can make an authenticated HTTP request to trigger this vulnerability.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-12-22T22:23:48.000000Z"}, {"uuid": "47654c99-0419-46e6-ae09-584fca44ed89", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21879", "type": "seen", "source": "https://t.me/cibsecurity/34543", "content": "\u203c CVE-2021-21879 \u203c\n\nA directory traversal vulnerability exists in the Web Manager File Upload functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially-crafted HTTP request can lead to arbitrary file overwrite. An attacker can make an authenticated HTTP request to trigger this vulnerability.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-12-22T22:23:46.000000Z"}, {"uuid": "2d4c2be0-a900-45d5-a7ae-ade76809b25f", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21878", "type": "seen", "source": "https://t.me/cibsecurity/34527", "content": "\u203c CVE-2021-21878 \u203c\n\nA local file inclusion vulnerability exists in the Web Manager Applications and FsBrowse functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially-crafted series of HTTP requests can lead to local file inclusion. An attacker can make a series of authenticated HTTP requests to trigger this vulnerability.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-12-22T22:23:23.000000Z"}, {"uuid": "06ee6a58-9596-4b72-8256-3a282d4365e2", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21871", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/3719", "content": "#Threat_Research\n1. Google Compute Engine (GCE) VM takeover via DHCP flood\nhttps://github.com/irsl/gcp-dhcp-takeover-code-exec\n2. PowerISO DMG File Format Handler memory corruption vulnerability (CVE-2021-21871)\nhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1308\n3. Analysis of a UaF Vulnerability in Adobe Acrobat Reader DC\nhttps://blog.exodusintel.com/2021/04/20/analysis-of-a-use-after-free-vulnerability-in-adobe-acrobat-reader-dc", "creation_timestamp": "2024-05-07T14:19:15.000000Z"}, {"uuid": "ebab9e0a-8f56-4e60-b6f2-00af886867ef", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21870", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/3935", "content": "#Threat_Research\n1. UaF vulnerabilities in Foxit PDF Reader (CVE-2021-21831, CVE-2021-21870, CVE-2021-21893)\nhttps://blog.talosintelligence.com/2021/07/vulnerability-spotlight-use-after-free.html\n2. Sunhillo SureLine Unauthenticated OS Command Injection (PoC for CVE-2021-36380)\nhttps://research.nccgroup.com/2021/07/26/technical-advisory-sunhillo-sureline-unauthenticated-os-command-injection-cve-2021-36380", "creation_timestamp": "2024-02-03T18:24:47.000000Z"}, {"uuid": "4b28dd84-6edf-4c28-8e48-3f5d576a68a2", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21871", "type": "seen", "source": "https://t.me/cissp/3597", "content": "Threat Research\n1. Google Compute Engine (GCE) VM takeover via DHCP flood\nhttps://github.com/irsl/gcp-dhcp-takeover-code-exec\n2. PowerISO DMG File Format Handler memory corruption vulnerability (CVE-2021-21871)\nhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1308\n3. Analysis of a use-after-free Vulnerability in Adobe Acrobat Reader DC\ud83d\ude19\nhttps://blog.exodusintel.com/2021/04/20/analysis-of-a-use-after-free-vulnerability-in-adobe-acrobat-reader-dc/?utm_source=rss&utm_medium=rss&utm_campaign=analysis-of-a-use-after-free-vulnerability-in-adobe-acrobat-reader-dc\n\nexploit\nCVE-2021-23383:\nThe package handlebars <4.7.7 are vulnerable to Prototype Pollution when selecting certain compiling options to compile templates coming from an untrusted source (PoC)\nhttps://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029\n+ Check the conditions for exploiting CVE-2021-23383 through the handlebars library version assessment:\nhttps://github.com/dn9uy3n/Check-CVE-2021-23383", "creation_timestamp": "2026-09-01T17:00:46.854834Z"}, {"uuid": "fd8b28aa-d0ba-45f8-b283-354b3617c775", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21870", "type": "seen", "source": "https://t.me/cissp/3912", "content": "Red Team Tactics\nHow to Phish for User Passwords with PowerShell\ud83d\ude03\nhttps://www.blackhillsinfosec.com/how-to-phish-for-user-passwords-with-powershell\n\nThreat Research\n1. Use-after-free vulnerabilities in Foxit PDF Reader (CVE-2021-21831, CVE-2021-21870, CVE-2021-21893)\nhttps://blog.talosintelligence.com/2021/07/vulnerability-spotlight-use-after-free.html?m=1\n2. Sunhillo SureLine Unauthenticated OS Command Injection (PoC for CVE-2021-36380)\nhttps://research.nccgroup.com/2021/07/26/technical-advisory-sunhillo-sureline-unauthenticated-os-command-injection-cve-2021-36380\n\nexploit\nCVE-2021-22146:\nElasticsearch ECE 7.13.x - The manipulation with an unknown input leads to a privilege escalation vulnerability (PoC)\ud83e\udd28\nhttps://github.com/magichk/cve-2021-22146\n\nCloud Security\nBlue Team Techniques\nThe Istio Service Mesh - Security Best Practices\nhttps://istio.io/latest/docs/ops/best-practices/security", "creation_timestamp": "2026-09-01T17:00:45.305738Z"}, {"uuid": "d88131dc-6adf-4f5f-aae4-b7876ab71d90", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21871", "type": "seen", "source": "https://t.me/cissp/3597", "content": "Threat Research\n1. Google Compute Engine (GCE) VM takeover via DHCP flood\nhttps://github.com/irsl/gcp-dhcp-takeover-code-exec\n2. PowerISO DMG File Format Handler memory corruption vulnerability (CVE-2021-21871)\nhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1308\n3. Analysis of a use-after-free Vulnerability in Adobe Acrobat Reader DC\ud83d\ude19\nhttps://blog.exodusintel.com/2021/04/20/analysis-of-a-use-after-free-vulnerability-in-adobe-acrobat-reader-dc/?utm_source=rss&utm_medium=rss&utm_campaign=analysis-of-a-use-after-free-vulnerability-in-adobe-acrobat-reader-dc\n\nexploit\nCVE-2021-23383:\nThe package handlebars <4.7.7 are vulnerable to Prototype Pollution when selecting certain compiling options to compile templates coming from an untrusted source (PoC)\nhttps://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029\n+ Check the conditions for exploiting CVE-2021-23383 through the handlebars library version assessment:\nhttps://github.com/dn9uy3n/Check-CVE-2021-23383", "creation_timestamp": "2026-09-02T01:04:34.409109Z"}, {"uuid": "7c204882-c7c6-450b-9692-a3c9411b327c", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21870", "type": "seen", "source": "https://t.me/cissp/3912", "content": "Red Team Tactics\nHow to Phish for User Passwords with PowerShell\ud83d\ude03\nhttps://www.blackhillsinfosec.com/how-to-phish-for-user-passwords-with-powershell\n\nThreat Research\n1. Use-after-free vulnerabilities in Foxit PDF Reader (CVE-2021-21831, CVE-2021-21870, CVE-2021-21893)\nhttps://blog.talosintelligence.com/2021/07/vulnerability-spotlight-use-after-free.html?m=1\n2. Sunhillo SureLine Unauthenticated OS Command Injection (PoC for CVE-2021-36380)\nhttps://research.nccgroup.com/2021/07/26/technical-advisory-sunhillo-sureline-unauthenticated-os-command-injection-cve-2021-36380\n\nexploit\nCVE-2021-22146:\nElasticsearch ECE 7.13.x - The manipulation with an unknown input leads to a privilege escalation vulnerability (PoC)\ud83e\udd28\nhttps://github.com/magichk/cve-2021-22146\n\nCloud Security\nBlue Team Techniques\nThe Istio Service Mesh - Security Best Practices\nhttps://istio.io/latest/docs/ops/best-practices/security", "creation_timestamp": "2026-09-02T01:04:32.016675Z"}]}