Week 46, 2021
15–21 November 2021
Newly exploited 4
Added to CISA KEV or flagged as exploited by ENISA this week — patch these first.
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High 8.8
CVE-2021-42321 KEV Nov 17, 2021 · ransomware Microsoft Exchange Server Remote Code Execution VulnerabilityEPSS 92%
Microsoft · Microsoft Exchange Server 2019 Cumulative Update 11 · Microsoft Exchange Server 2016 Cumulative Update 22 · Microsoft Exchange Server 2016 Cumulative Update 21
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High 7.8
CVE-2021-40449 KEV Nov 17, 2021 · ransomware Win32k Elevation of Privilege VulnerabilityEPSS 82%
Microsoft · Windows Server 2019 · Windows Server 2019 (Server Core installation) · Windows 10 Version 1809
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High 7.8
CVE-2021-42292 KEV Nov 17, 2021 Microsoft Excel Security Feature Bypass VulnerabilityEPSS 43%
Microsoft · Microsoft 365 Apps for Enterprise · Microsoft Office LTSC 2021 · Microsoft Office LTSC for Mac 2021
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Medium 6.8
CVE-2021-22204 KEV Nov 17, 2021 Improper neutralization of user data in the DjVu file format in ExifTool versions 7.44 and up allows arbitrary code execution when parsing the malicious imageEPSS 100%
Critical new vulnerabilities
Published this week with a CVSS score of 9.0 or higher, most likely to be exploited first.
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Critical 10.0
CVE-2021-41277 GeoJSON URL validation can expose server files and environment variables to unauthorized usersEPSS 97%
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Critical 9.8
CVE-2021-44026 Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to a potential SQL injection via search or search_params.EPSS 70%
- Critical 9.8 EPSS 41%
- Critical 9.8 EPSS 15%
- Critical 9.8 EPSS 5.8%
- Critical 10.0 EPSS 4.3%
- Critical 9.8 EPSS 3.4%
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Critical 10.0
CVE-2021-40391 An out-of-bounds write vulnerability exists in the drill format T-code tool number functionality of Gerbv 2.7.0, dev (commit b5f1eacd), and the forked version …EPSS 3%
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Critical 9.0
CVE-2021-42114 Scalable Rowhammering In the Frequency Domain to Bypass TRR Mitigations On Modern DDR4/LPDDR4X DevicesEPSS 3%
- Critical 9.1 EPSS 2.9%
- Critical 9.8 EPSS 2.5%
- Critical 9.1 EPSS 2.4%
- Critical 9.1 EPSS 2.4%
- Critical 9.8 EPSS 1.7%
- Critical 9.8 EPSS 1.3%
Not critical, but likely targeted
New this week with the highest EPSS — a lower CVSS score does not mean nobody will use them.
- High 8.8 EPSS 80%
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Unscored
CVE-2021-41951 ResourceSpace before 9.6 rev 18290 is affected by a reflected Cross-Site Scripting vulnerability in plugins/wordpress_sso/pages/index.php via the wordpress_use…EPSS 78%
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Unscored
CVE-2021-41950 A directory traversal issue in ResourceSpace 9.6 before 9.6 rev 18277 allows remote unauthenticated attackers to delete arbitrary files on the ResourceSpace se…EPSS 75%
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Unscored
CVE-2021-41765 A SQL injection issue in pages/edit_fields/9_ajax/add_keyword.php of ResourceSpace 9.5 and 9.6 < rev 18274 allows remote unauthenticated attackers to execute a…EPSS 68%
- High 8.6 EPSS 48%
- High 7.3 EPSS 38%
- High 7.6 EPSS 13%
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Unscored
CVE-2021-42580 Sourcecodester Online Learning System 2.0 is vunlerable to sql injection authentication bypass in admin login file (/admin/login.php) and authenticated file up…EPSS 10%
Advisories
- Oracle Linux Security Advisories (ELSA) 79
- SUSE / openSUSE Security Updates 50
- Debian Security (DSA / DLA) 9
- BSI CERT-Bund (WID) 8
- Ubuntu Security Notices (USN) 6
- CISA ICS & IT advisories 4
- Rocky Linux Security Advisories 4
- CERT@VDE 42 critical
- AlmaLinux Security Advisories 3
- Microsoft Security Response Center 3
- VDE-2021-050 WAGO: Multiple devices affected by Vulnerabilities in NUCLEUS TCP Stack. 12 CVEs
- VDE-2021-056 WAGO: Multiple Vulnerabilities in CODESYS Runtime 2.3 and WebVisualisation 6 CVEs