CVE-2023-21707 Public exploit High · 8.8 EPSS 82.0%
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft · Microsoft Exchange Server 2013 Cumulative Update 23
Summary
Microsoft Exchange Server 2013 Cumulative Update 23 contains a remote code execution flaw involving deserialization of untrusted data. An attacker with network access and low-privilege authentication, requiring no user interaction, could exploit this flaw to execute arbitrary code.
Heading is the official description · CVE.org
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
31.8 / 100
- Exploited
- Not confirmed
- Reports
- 0
- Tactics
- 0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
Public exploit code (PoC-in-GitHub) appeared 4 months after disclosure. No confirmed exploitation is recorded.
- Disclosedday 0
- Public exploit codePoC-in-GitHub+4 mo
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linkedNo ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.
What security researchers reported
Not named in any threat report yetAlso mentioned in 1 community threat pulse (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.