Microsoft Exchange Server 2013 Cumulative Update 23

productUS

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

unpatched

by severity

1critical7high12medium0low

updated 2026-10-27

vulnerabilities (34)

Related CVEs.

sort

ID	severity	EPSS	exploitable	patched	published	affected
CVE-2021-34473US	high10.0OT critical	100.0% (100th)	KEV	15.00.1497.015	2021-07-14	2 versions
CVE-2021-26855US	high7.5OT critical	100.0% (100th)	KEV	15.00.1497.012	2021-03-03	2 versions
CVE-2021-34523US	high7.5OT critical	100.0% (100th)	KEV	15.00.1497.015	2021-07-14	2 versions
CVE-2022-41082US	—OT critical	100.0% (100th)	KEV	15.00.1497.044	2022-10-03	2 versions
CVE-2022-41040US	—OT critical	100.0% (100th)	KEV	15.00.1497.044	2022-10-03	2 versions
CVE-2021-27065US	medium6.8OT critical	99.9% (100th)	KEV	15.00.1497.012	2021-03-03	2 versions
CVE-2021-33766US	medium5.0OT critical	98.2% (100th)	KEV	15.00.1497.015	2021-07-14	2 versions
CVE-2021-26857US	medium6.8OT critical	95.8% (100th)	KEV	15.00.1497.012	2021-03-03	2 versions
CVE-2022-41080US	—OT critical	77.3% (100th)	KEV	15.00.1497.044	2022-11-09	2 versions
CVE-2021-26858US	medium6.8OT critical	93.7% (100th)	KEV	15.00.1497.012	2021-03-03	2 versions
CVE-2023-21529US	—OT critical	59.3% (99th)	KEV	15.00.1497.047	2023-02-14	2 versions
CVE-2021-31196US	medium6.5OT critical	54.1% (99th)	KEV	15.00.1497.023	2021-07-14	2 versions
CVE-2021-41349US	medium4.3	93.5% (100th)	Exploit	15.00.1497.026	2021-11-10	2 versions
CVE-2023-21707US	—	82.0% (100th)	Exploit	15.00.1497.048	2023-02-14	2 versions
CVE-2022-23277US	medium6.5	41.1% (99th)	Exploit	15.00.1497.033	2022-03-09	2 versions
CVE-2021-34470US	medium5.2	4.38% (91st)	Exploit	15.00.1497.023	2021-07-14	2 versions
CVE-2021-26412US	medium6.5	33.8% (98th)	—	15.00.1497.012	2021-03-03	2 versions
CVE-2021-26854US	medium6.5	24.7% (98th)	—	15.00.1497.012	2021-03-03	2 versions
CVE-2021-27078US	medium6.5	21.6% (98th)	—	15.00.1497.012	2021-03-03	2 versions
CVE-2021-31206US	high7.9	13.0% (96th)	—	15.00.1497.023	2021-07-14	2 versions
CVE-2021-42305US	medium4.3	7.87% (95th)	—	15.00.1497.026	2021-11-10	2 versions
CVE-2023-21706US	—	4.06% (91st)	—	15.00.1497.047	2023-02-14	2 versions
CVE-2022-21980US	—	2.74% (86th)	—	15.00.1497.042	2022-08-09	2 versions
CVE-2022-24516US	—	2.45% (84th)	—	15.00.1497.042	2022-08-09	2 versions
CVE-2022-24477US	—	2.31% (83rd)	—	15.00.1497.042	2022-08-09	2 versions
CVE-2022-21979US	—	2.22% (83rd)	—	15.00.1497.042	2022-08-09	2 versions
CVE-2022-30134US	—	2.14% (82nd)	—	15.00.1497.042	2022-08-09	2 versions
CVE-2023-21762US	—	1.59% (76th)	—	15.00.1497.045	2023-01-10	2 versions
CVE-2022-21969US	critical9.0	1.12% (66th)	—	15.00.1497.028	2022-01-11	2 versions
CVE-2022-21846US	high8.3	1.06% (64th)	—	15.00.1497.028	2022-01-11	2 versions
CVE-2022-21855US	high7.7	0.93% (60th)	—	15.00.1497.028	2022-01-11	2 versions
CVE-2022-21978US	high7.2	0.87% (59th)	—	15.00.1497.36	2022-05-10	2 versions
CVE-2022-41079US	—	0.84% (58th)	—	15.00.1497.044	2022-11-09	2 versions
CVE-2022-41078US	—	0.84% (58th)	—	15.00.1497.044	2022-11-09	2 versions

weaknesses (8)

The flaw types (CWEs) most of these CVEs share.

CWE-94Improper Control of Generation of Code ('Code Injection')8 CVEs
CWE-20Improper Input Validation7 CVEs
CWE-264CWE-2647 CVEs
CWE-502Deserialization of Untrusted Data6 CVEs
CWE-451User Interface (UI) Misrepresentation of Critical Information4 CVEs
CWE-918Server-Side Request Forgery (SSRF)3 CVEs
CWE-200Exposure of Sensitive Information to an Unauthorized Actor1 CVEs
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')1 CVEs

sources (1)

Which sources assert this record, and when.

USMicrosoft MSRC (CSAF)34 CVEs

scry

Products carry known vulnerabilities once they are exposed to the internet. See what is exposed on your perimeter with a free passive scan.

Free scan