CVE-2026-27913Patch(microsoft / windows_server_2012)

LOWCVSS 7.7 · HIGH

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

  • Patch microsoft windows_server_2012 systems immediately
  • Hunt for exploitation attempts and persistence artifacts
  • Increase monitoring for publicly documented tradecraft

Recommended action window: High priority (within 72h)

NVD description

Improper input validation in Windows BitLocker allows an unauthorized attacker to bypass a security feature locally.

2.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-20

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

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

  • windows_server_2012
  • windows_server_2016
  • windows_server_2019
  • windows_server_2022

Threat summary

  • Public PoC is present in monitored signal
  • Patch or workaround signal is available
  • 10 mentions across 4 observed days
  • Momentum state: stable

What's happening

  • PoC mentioned or linked in 1 signal
  • Patch or workaround mentioned in 7 signals
  • Technical details provided in 7 signals
  • Disclosure: 2 classified signals
  • Peaked 2d ago at 7 mentions (2026-04-15); latest day: 1
  • 10 total mentions across 4 days

Affected systems

Vendors
Products
windows_server_2012windows_server_2016windows_server_2019windows_server_2022windows_server_2022_23h2

2 versions affected across 5 products

Deep dive

Activity timeline10 mentions / 4d
02457Mentions · 2026-04-14: 1Mentions · 2026-04-15: 7Mentions · 2026-04-16: 1Mentions · 2026-04-22: 1PoC Mentioned / Linked · 2026-04-15: 1Patch / Workaround · 2026-04-15: 5Patch / Workaround · 2026-04-16: 1Patch / Workaround · 2026-04-22: 1Technical Details · 2026-04-14: 1Technical Details · 2026-04-15: 4Technical Details · 2026-04-16: 1Technical Details · 2026-04-22: 104-1404-1504-1604-22
Signal classification3 categories
Patch
770.0%
Disclosure
220.0%
PoC
110.0%
Referenced assets8 URLs
Classification over time
DateTotalLabels
2026-04-141
Disclosure1
2026-04-157
Disclosure1Patch5PoC1
2026-04-161
Patch1
2026-04-221
Patch1
Full discourse10 posts
  • Cyber Security News@The_Cyber_News
    Patch

    🛡️ Windows BitLocker Vulnerability Allows Attacker to Bypass Security Feature | Source: https://cybersecuritynews.com/windows-bitlocker-security-vulnerability/ Microsoft officially released security updates to address a significant vulnerability in Windows BitLocker. Tracked as CVE-2026-27913, this security feature bypass vulnerability was discovered by security researcher Alon Leviev in collaboration with the Microsoft STORM team. The flaw poses a substantial risk to enterprise device security architectures. However, there is currently no evidence of active exploitation or publicly available exploit code. Microsoft has classified the vulnerability as "Important" and explicitly warns that exploitation is more likely in the near future. #cybersecuritynews

    Post summary

    The post announces Microsoft’s release of security updates for CVE-2026-27913, noting the vulnerability’s risk but no current exploitation evidence.

    36322707418.3K
    66.3K followersView on X
  • iototsecnews@iototsecnews
    Patch

    Windows BitLocker の脆弱性 CVE-2026-27913 が FIX:ローカル攻撃者による Secure Boot 回避 https://iototsecnews.jp/2026/04/15/windows-bitlocker-vulnerability-allows-attacker-to-bypass-security-feature/ この脆弱性の原因は、Windows BitLocker が特定の入力データを処理する際のチェック機能 (入力検証) の不備にあります。脆弱性 CVE-2026-27913 は、コンピューティングの起動時に信頼できるプログラムだけを動かす Secure Boot という重要な防御壁を、根底から無効化 (バイパス) するという事態を引き起こしかねないものです。攻撃に際しては、コンピュータに対する直接的な操作 (ローカルアクセス) が必要ですが、この壁を一度でも突破されると、OS が起動する前の段階でのシステム改竄や、暗号化されているはずのディスク・データへの不正アクセスなどのリスクが生じます。2026年04月の Patch Tuesday で修正されていますので、ご確認ください。 #CVE202627913 #Microsoft #Vulnerability #WindowsBitLocker

    Post summary

    CVE‑2026‑27913 is a local‑access vulnerability in Windows BitLocker that could bypass Secure Boot, but a patch was released in April Patch Tuesday.

    01000187
    486 followersView on X
  • Ebryx LLC@Ebryx
    Patch

    @The_Cyber_News BitLocker bypass via CVE-2026-27913 proves even gold-standard encryption isn't invincible. This is exactly why patching must be non-negotiable combined with TPM, Secure Boot, and ironclad physical security. Enterprises: Deploy April patches today. The window is closing.

    Post summary

    The post highlights the CVE-2026-27913 BitLocker bypass and urges enterprises to apply the April patches immediately to mitigate the risk.

    00010500
    195 followersView on X
  • Cyber Edition@CyberEdition
    Patch

    🔓 BitLocker flaw (CVE-2026-27913) lets attackers bypass Secure Boot locally. No exploit seen yet, but impact is high on data integrity & confidentiality. Patch ASAP if you’re on affected Windows Server versions. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27913 #CyberSecurity

    Post summary

    Microsoft warned that CVE‑2026‑27913, a BitLocker flaw allowing local Secure Boot bypass, is severe and requires patching, but no exploitation has been observed.

    00010141
    719 followersView on X
  • kawn@kawn2020
    Disclosure

    #windowsupdate #microsoft つづき ・CVE-2026-26169 6.1 Windows カーネル メモリ ・CVE-2026-27906 4.4 Windows Hello ・CVE-2026-27908 7  Windows TDI 翻訳ドライバー(tdx.sys) ・CVE-2026-27909 7.8 Microsoft Windows 検索コンポーネント ・CVE-2026-27913 7.7 Windows BitLocker …

    Post summary

    The tweet announces a set of newly disclosed Windows CVEs, providing their identifiers, affected components, and CVSS severity scores while offering no details on exploitation or remediation.

    10000189
    85 followersView on X
  • The Daily Tech Feed@dailytechonx
    Patch

    Critical Windows BitLocker vulnerability (CVE-2026-27913) allows attackers to bypass Secure Boot and access encrypted data. Immediate patching recommended! Link: https://thedailytechfeed.com/microsoft-patches-critical-bitlocker-flaw-allowing-secure-boot-bypass-and-data-exposure/ #Security #Vulnerability #Patch #Windows #BitLocker #Encryption #Data #SecureBoot #Threat #Attack #Protection #Cyber #Technology #Update #Microsoft #Hack #Exploit #Safety #Risk #Defend

    Post summary

    CVE-2026-27913 is a serious BitLocker flaw that lets attackers bypass Secure Boot and read encrypted data; the article urges immediate patching and provides further details.

    000003
    279 followersView on X
  • ملاذك الرقمي@Malathknet
    Patch

    ثغرة خطيرة في BitLocker (CVE-2026-27913) تسمح بتجاوز Secure Boot وتهدد أمان البيانات 🔓 📉 لا تحتاج صلاحيات عالية 💻 تتطلب وصول محلي فقط ✅ الحل: تحديثات أبريل 2026 تفاصيل اكثر 👇 https://malathk.net/2026/04/15/windows-bitlocker/ #CyberSecurity #Windows

    Post summary

    The post announces a critical BitLocker flaw (CVE-2026-27913) that bypasses Secure Boot with local access, and notes that patches will be released in April 2026.

    0000096
    6 followersView on X
  • cybersecuritypath@cybrsecpath
    Patch

    April 2026 Patch Tuesday: BitLocker Bypass CVE-2026-27913 https://thecybrdef.com/april-2026-patch-tuesday-bitlocker-bypass-cve-2026-27913/

    Post summary

    The article announces a Patch Tuesday update for BitLocker, indicating that a patch is available for CVE‑2026‑27913.

    0000089
    3 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-27913 Improper input validation in Windows BitLocker allows an unauthorized attacker to bypass a security feature locally. https://www.cve.org/CVERecord?id=CVE-2026-27913

    Post summary

    CVE-2026-27913 is a Windows BitLocker input‑validation flaw that permits a local attacker to bypass a security feature; no proof‑of‑concept, exploit code, active exploitation, or patch information is referenced.

    00000171
    57.2K followersView on X
  • UNDERCODE TESTING@UndercodeUpdate
    PoC

    🚨 Critical #Windows BitLocker #CVE-2026-27913 Bypass – Enterprise Security Hardening Guide + Video https://undercodetesting.com/critical-windows-bitlocker-cve-2026-27913-bypass-enterprise-security-hardening-guide-video/ Educational Purposes!

    Post summary

    The post provides a link to a guide and video illustrating a BitLocker bypass for CVE‑2026‑27913, suggesting a proof‑of‑concept demonstration, but contains no active exploit, patch information, or technical details.

    00000101
    492 followersView on X
CPE platform detail6 entries

6 of 6 entries

PartVendorProductVersionTarget SWTarget HW
OSmicrosoftwindows_server_2012---
OSmicrosoftwindows_server_2012r2--
OSmicrosoftwindows_server_2016---
OSmicrosoftwindows_server_2019---
OSmicrosoftwindows_server_2022---
OSmicrosoftwindows_server_2022_23h2---

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