Vulnerability

CVE-2022-41082

High· 8.0KEVEXPLOITCVSS8EPSS91%

.rules3/5

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server contains an unspecified vulnerability that allows for authenticated remote code execution. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41040 which allows for the remote code execution.

Threat signal

100/100

Severe

Severity

high

CVSS

8.0

EPSS

91%

Active

KEV

CISA KEV — actively exploited

Ransomware: Known1331d overdue

AffectedMicrosoft — Exchange Server

Added to KEV

2022-09-30

Federal patch due (BOD 22-01)

2022-10-21

Required action (CISA verbatim)

Apply updates per vendor instructions.

Vendor advisory + references

CISA description: “Microsoft Exchange Server contains an unspecified vulnerability that allows for authenticated remote code execution. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41040 which allows for the remote code execution.”

CVSS

v3.1Open in FIRST calculator →

8.0/ 10HIGHCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorAdjacentRequires same broadcast / collision domain (LAN, Bluetooth, MPLS).
Attack ComplexityLowNo special conditions — exploit works reliably.
Privileges RequiredLowStandard user privileges sufficient.
User InteractionNoneFully automated — no victim action needed.
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactHighTotal compromise of integrity — full data modification possible.
Availability ImpactHighTotal loss of availability — full DoS possible.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

90.8%

probability of exploitation in next 30 days

p100

higher than 100% of all CVEs

3-day trend↑ 0pp

Statistically about to be weaponized — top-tier triage urgency.

Vendor VEX

No VEX statements published for CVE-2022-41082. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAct

Active exploitation with total impact on essential/support systems

exploitation: active
automatable: yes
impact: total
mission: support

Lifecycle

2022-09-30Added to CISA KEVransomware: Known
2022-09-30Public exploit observedmetasploit
2022-09-30Published
2022-10-21Federal patch due (BOD 22-01)
2026-06-12Last modified1 source

Mentions in news & research

research:wizOWASSRF, a new exploit for Exchange vulnerabilities, exploited in the wild: everything you need to know2022-12-22

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.