CVE-2026-32186Network attack vector

Unauthenticated privilege escalation via server-side request forgery

Published Apr 3, 2026 · Updated Apr 3, 2026

Server-side request forgery in Microsoft Bing allows remote attackers to elevate privileges through network requests to the hosted service. Microsoft has not disclosed the affected endpoint or field, but the flaw causes Bing to turn attacker-controlled input into a server-side request to an unintended destination. No authentication or user interaction is required, but the specific privileges gained and backend resources reached remain undisclosed.

CVSS severity10.0
Critical
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Microsoft Bing allows remote attackers to elevate privileges through network requests to the hosted service. Microsoft has not disclosed the affected endpoint or field, but the flaw causes Bing to turn attacker-controlled input into a server-side request to an unintended destination. No authentication or user interaction is required, but the specific privileges gained and backend resources reached remain undisclosed.

The record

CVE
CVE-2026-32186
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
Microsoft
Product
Microsoft Bing
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Bingversion=-

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
8.7Microsoft Security Response CenterCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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