VulnSocial

CVE-2026-62912Patch(microsoft / exchange_server)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch microsoft exchange_server systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service over a network.

microsoft CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-502

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • exchange_server
  • exchange_server_subscription_edition

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 3 signals
  • Technical details provided in 2 signals
  • Disclosure: 1 classified signal
  • Peaked 2d ago at 1 mentions (2026-08-11); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
microsoft
Products
exchange_serverexchange_server_subscription_edition

2 versions affected across 2 products

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-08-11: 1Mentions · 2026-08-12: 1Mentions · 2026-08-13: 1Patch / Workaround · 2026-08-11: 1Patch / Workaround · 2026-08-12: 1Patch / Workaround · 2026-08-13: 1Technical Details · 2026-08-11: 1Technical Details · 2026-08-13: 108-1108-1208-13
Signal classification2 categories
Patch
266.7%
Disclosure
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-08-111
Disclosure1
2026-08-121
Patch1
2026-08-131
Patch1
Full discourse3 posts
  • Aretiq.AI@AretiqAI
    Disclosure

    An authenticated attacker can crash Microsoft Exchange Server via a deserialization flaw — taking down email for entire organizations. CVE-2026-62912 · CVSS 6.5 · All supported Exchange versions affected (2016 CU23, 2019 CU14/CU15, SE RTM). Discovered by Aretiq AI, responsibly disclosed to Microsoft, and patched today in the August 2026 Patch Tuesday updates. https://aretiq.ai/discoveries/cve-2026-62912-microsoft-exchange-server-deserialization-dos/

    Post summary

    The post announces the discovery of a deserialization flaw in Microsoft Exchange Server, provides technical details and affected versions, and reports that Microsoft has released a patch in the August 2026 Patch Tuesday updates.

    10043786
    232 followersView on X
  • TECHEPAGES@techepages
    Patch

    Breakdown of Exchange Server vulnerabilities by version from the August 2026 Patch Tuesday: 🖥️ Exchange Server 2016, 2019, Subscription Edition (All supported on‑premises versions are affected by each CVE below) 🔵 CVE-2026-62910 – Elevation of Privilege (resource injection) 🔵 CVE-2026-62911 – Elevation of Privilege (auth bypass replay attack, CVSS 8.0) 🔵 CVE-2026-62912 – Denial of Service (deserialization flaw) 🔵 CVE-2026-62913 – Remote Code Execution (heap buffer overflow, CVSS 8.8) 🔵 CVE-2026-62914 – Spoofing (XSS) 🔵 CVE-2026-62915 – Security Feature Bypass (missing authorization checks) Exchange Online is already protected, but on‑premises Exchange 2016, 2019, and Subscription Edition must be patched immediately. 🔵 CVE-2026-62914 – Spoofing (XSS) 🔵 CVE-2026-62915 – Security Feature Bypass (missing authorization checks)

    Post summary

    The post lists multiple CVEs affecting on‑premises Exchange Server versions and urges immediate patching, highlighting the vulnerability types and severity.

    0000061
    38 followersView on X
  • Windows Forum@windowsforum
    Patch

    🛡️ Exchange DoS CVE-2026-62912 arrives with scant technical detail—and Exchange 2016/2019 need ESU to patch. Nothing says “secure your mail” like an upgrade paywall. https://windowsforum.com/security-alerts.84/cve-2026-62912-exchange-dos-2016-2019-require-esu-to-patch.442664/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #ExtendedSecurityUpdates #ExchangeServer #MicrosoftExchange #Cve202662912 https://t.co/IuGl0EGLSU

    Post summary

    The alert reports a DoS vulnerability (CVE-2026-62912) affecting Exchange 2016/2019 and requires ESU patches, but it offers no technical details or exploitation evidence.

    0000067
    1.3K followersView on X
CPE platform detail38 entries

38 of 38 entries

PartVendorProductVersionTarget SWTarget HW
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2016--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server2019--
Appmicrosoftexchange_server_subscription_edition---

Explore more

Back to dashboardmicrosoft CVEsexchange_server vulnerabilities