Vulnerabilitymedium

Researchers unearth keyloggers on Outlook login pages

Help Net Securityby @zeljkazorzJun 17, 2025 · 00:00 UTC (Jun 17, 2025)2 min read3 · 1 read

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CVEs: CVE-2021-26855 CVE-2021-34473 CVE-2021-34523 CVE-2021-31207 CVE-2020-0796

Tags: cve-2021-26855 cve-2021-34473 cve-2021-34523 cve-2021-31207 cve-2020-0796 vulnerability

Vulnerabilities mentioned

All

CVE	Vulnerability	CVSS	EPSS	Signals	Published
CVE-2020-0796	Unauthenticated RCE in Microsoft SMBv3 (SMBGhost)	10.0	100%	KEVRansomwarePoC ×2	Mar 12, 2020 KEV Feb 10, 2022
CVE-2021-26855	Unauthenticated SSRF/RCE in Microsoft Exchange Server (ProxyLogon)	9.1	100%	KEVRansomwarePoC ×4	Mar 3, 2021 KEV Nov 3, 2021
CVE-2021-31207	Security feature bypass in Microsoft Exchange Server (ProxyShell) enables webshell RCE	6.6	100%	KEVRansomwarePoC	May 11, 2021 KEV Nov 3, 2021
CVE-2021-34473 +1 related CVE CVE-2021-34523	SSRF (CWE-918) in Microsoft Exchange Server Enabling RCE (ProxyShell)	9.1 group max	100%	KEVRansomwarePoC	Jul 14, 2021 KEV Nov 3, 2021

From the original article

2 min read at helpnetsecurity.com

Unknown threat actors have compromised internet-accessible Microsoft Exchange Servers of government organizations and companies around the world, and have injected the organizations’ Outlook on the Web (OWA) login page with browser-based keyloggers, Positive Technologies researchers have warned.

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By @zeljkazorz · helpnetsecurity.com

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