Known exploited vulnerability
CVE-2022-41040
The short answer
CVE-2022-41040 affects Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-09-30: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
Microsoft Exchange Server Elevation of Privilege Vulnerability
Weakness: CWE-918.
Severity
8.8 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Sep 30, 2022
Federal due date Oct 21, 2022
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Exchange Server 2016 Cumulative Update 22, Microsoft Exchange Server 2019 Cumulative Update 11, Microsoft Exchange Server 2019 Cumulative Update 12, Microsoft Exchange Server 2016 Cumulative Update 23. NVD's record lists the exact affected versions.
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41040 PatchVendor Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41040 MitigationPatchVendor Advisory
- www.kb.cert.org/vuls/id/915563 Third Party AdvisoryUS Government Resource
- www.secpod.com/blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-including-6-zero-days/ Third Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41040 US Government Resource
Questions
Is CVE-2022-41040 being exploited?
Yes. CISA added CVE-2022-41040 to its Known Exploited Vulnerabilities catalog on 2022-09-30, with a federal remediation due date of 2022-10-21. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2022-41040?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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