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CVE detail

CVE-2025-53786

On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying non-security Hot Fix. Microsoft made these changes in the general interest of improving the security of hybrid Exchange deployments. Following further investigation, Microsoft identified specific security implications tied to the guidance and configuration steps outlined in the April announcement. Microsoft is issuing CVE-2025-53786 to document a vulnerability that is addressed by taking the steps documented with the April 18th announcement. Microsoft strongly recommends reading the information, installing the April 2025 (or later) Hot Fix and implementing the changes in your Exchange Server and hybrid environment.

CVSS 8.0 · HighBuzz score 34.4

Buzz score

Why this CVE is surfacing

Buzz score total 34.4

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 24.9 · diversity 9.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
24.9
11 evidence mentions in the snapshot
Diversity score
9.5
4 sources across 1 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
11 source links · newest first
  • Cyber agencies produce ‘long overdue’ best practices for securing Microsoft Exchange ServerCSO Online

    Cyber agencies from three countries including the US have issued a list of security best practices for protecting Microsoft Exchange Server, a venerable on-premises email server that many IT departments still cling to. The advisory, also endorsed by Australia and Canada, comes at a good time: Threat actors are still poking at holes in Exchange […]

    newswww.csoonline.comOct 31, 2025, 11:37 PM
  • Security Affairs newsletter Round 539 by Pierluigi Paganini – INTERNATIONAL EDITIONSecurity Affairs

    A new round of the weekly Security Affairs newsletter has arrived! Every week, the best security articles from Security Affairs are free in your email box. Enjoy a new round of the weekly SecurityAffairs newsletter, including the international press. Lab Dookhtegan hacking group disrupts communications on dozens of Iranian ships New zero-click exploit allegedly used […]

    newssecurityaffairs.comAug 31, 2025, 5:51 AM
  • Microsoft fixes “BadSuccessor” Kerberos vulnerability (CVE-2025-53779)Help Net Security

    For August 2025 Patch Tuesday, Microsoft has released security updates resolving 100+ security vulnerabilities in its various solutions, including a relative path traversal flaw in Windows Kerberos (CVE-2025-53779) that allows an authorized attacker to elevate privileges over a network as part of a BadSuccessor attack. The vulnerability, discovered by Akamai researcher Yuval Gordon, exploits the delegated Managed Service Account (dMSA) feature that was introduced in Windows Server 2025 and can be used to compromise any … More →

    newswww.helpnetsecurity.comAug 13, 2025, 12:05 PM
  • Week in review: SonicWall firewalls targeted in ransomware attacks, Black Hat USA 2025Help Net Security

    Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Black Hat USA 2025 Black Hat USA 2025 took place at the Mandalay Bay Convention Center in Las Vegas. Explore related news, photos, product releases, and more. AIBOMs are the new SBOMs: The missing link in AI risk management In this Help Net Security interview, Marc Frankel, CEO at Manifest Cyber, discusses how overlooked AI-specific risks, like poisoned training data … More →

    newswww.helpnetsecurity.comAug 10, 2025, 8:00 AM
  • Security Affairs newsletter Round 536 by Pierluigi Paganini – INTERNATIONAL EDITIONSecurity Affairs

    A new round of the weekly Security Affairs newsletter has arrived! Every week, the best security articles from Security Affairs are free in your email box. Enjoy a new round of the weekly SecurityAffairs newsletter, including the international press. Embargo Ransomware nets $34.2M in crypto since April 2024 Germany limits police spyware use to serious […]

    newssecurityaffairs.comAug 10, 2025, 1:55 AM
  • In Other News: Nvidia Says No to Backdoors, Satellite Hacking, Energy Sector AssessmentSecurityWeek

    Noteworthy stories that might have slipped under the radar: federal court filing system hack, Chanel data breach, emergency CISA directive.

    newswww.securityweek.comAug 8, 2025, 12:09 PM
  • August 2025 Patch Tuesday forecast: Try, try againHelp Net Security

    July turned into a surprisingly busy month. It started slowly with a fairly ‘calm’ Patch Tuesday as I forecasted in my last blog. Although there were 130 new CVEs addressed across all the Microsoft releases, there was only one publicly disclosed CVE, so the risk was low. But a short time later, two CVEs in SharePoint were reported exploited, and the month started to heat up with hotfixes near the end of the month. Mix … More →

    newswww.helpnetsecurity.comAug 8, 2025, 6:20 AM
  • Hybrid Exchange environment vulnerability needs fast actionCSO Online

    Administrators with hybrid Exchange Server environments are urged by Microsoft and the US Cybersecurity and Infrastructure Security Agency (CISA) to quickly plug a high-severity vulnerability or risk system compromise. Hybrid Exchange deployments offer organizations the ability to extend the user features and admin controls of the on-prem version of Exchange within Microsoft 365. Hybrid deployment […]

    newswww.csoonline.comAug 7, 2025, 6:41 PM
  • Microsoft urges admins to plug severe Exchange security hole (CVE-2025-53786)Help Net Security

    “In an Exchange hybrid deployment, an attacker who first gains administrative access to an on-premises Exchange server could potentially escalate privileges within the organization’s connected cloud environment without leaving easily detectable and auditable trace,” Microsoft has announced on Wednesday. The privilege escalation can be performed by exploiting CVE-2025-53786, a newly disclosed vulnerability that stems from Exchange Server and Exchange Online sharing the same service principal – i.e., the Office 365 Exchange Online application – in … More →

    newswww.helpnetsecurity.comAug 7, 2025, 2:25 PM
  • CISA, Microsoft warn of critical Exchange hybrid flaw CVE-2025-53786Security Affairs

    CISA and Microsoft warn of CVE-2025-53786, a high-severity Exchange flaw allowing privilege escalation in hybrid cloud environments. CISA and Microsoft warn of a high-severity flaw, tracked as CVE-2025-53786, in Exchange hybrid deployments that allows attackers to escalate privileges in cloud setups. Microsoft address the vulnerability in Exchange Server 2016, 2019 and Subscription Edition RTM. The […]

    newssecurityaffairs.comAug 7, 2025, 2:02 PM
  • Organizations Warned of Vulnerability in Microsoft Exchange Hybrid DeploymentSecurityWeek

    CISA and Microsoft have issued advisories for CVE-2025-53786, a high-severity flaw allowing privilege escalation in cloud environments.

    newswww.securityweek.comAug 7, 2025, 11:08 AM

Exploit code

Public exploit repository references

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