Viettel Cyber Security

A Cybersecurity company from Vietnam

[Viettel Cyber Security @ViettelCyberSec]

🚨 VCS warns of active attacks on a critical SharePoint vuln we first discovered & reported.
Hackers can bypass auth & take over on-prem servers.
📌 Read our guidance: prevention, detection, hunting & more.
https://t.co/nbzLcN0rWp

[Viettel Cyber Security @ViettelCyberSec]

🏆 Viettel Cyber Security wins Best Red Teaming at the 2026 @TheHackersNews
CyberStars Awards!

🇻🇳 The only winner in the category.
🌏 Global recognition for cybersecurity expertise from Vietnam.

#Cybersecurity #RedTeam #OffensiveSecurity

[TrendAI Zero Day Initiative @thezdi]

Confirmed! Le Tran Hai Tung (@tacbliw), dungnm (@dungnm_) and hieuvd (@gr4ss341) of Viettel Cyber Security (@vcslab) used an integer overflow to escalate privileges on #Windows 11. Their 5th round win nets them $7,500 and 3 Master of Pwn points. #Pwn2Own

[TrendAI Zero Day Initiative @thezdi]

Locked in! Le Duc Anh Vu (@vulda17) of Viettel Cyber Security (@vcslab) exploited Cursor, earning $30,000 and 3 Master of Pwn points. Full win! #Pwn2Own #P2OBerlin

[TrendAI Zero Day Initiative @thezdi]

Boom! @rewhiles of Viettel Cyber Security was able to exploit Anthropic Claude Code! If confirmed, they win $40,000 and 4 Master of Pwn points. They're off to the disclosure room to explain how they did it. #Pwn2Own #P2OBerlin

[TrendAI Zero Day Initiative @thezdi]

Another collision! Although successful on stage, @rewhiles of Viettel Cyber Security (@vcslab) targeting Anthropic Claude Code in the Coding Agent category used a bug that was previously known to the vendor. They still earn $20,000 and 2 Master of Pwn points. #Pwn2Own #P2OBerlin

[TheZDIBugs @TheZDIBugs]

[ZDI-26-160|CVE-2026-3562] (Pwn2Own) Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability (CVSS 6.3; Credit: Viettel Cyber Security) https://t.co/I8VDxFMdR7

[Viettel Cyber Security @ViettelCyberSec]

Our team is ready to fire at ROOTCON Hacking Conference Philippines🔥🔥🔥

Let’s join our booth and receive many great swags and meet our top ethical hackers 😎@haxor31337

Also let’s wait for the result of our young CTF team if they can defend the title of their mentors 👏

[Viettel Cyber Security @ViettelCyberSec]

VCS Experts Continue to Be Recognized in Microsoft’s 2025 Annual Leaderboard of Top 100 Most Valuable Researchers!

📷 Dinh Van Tuan (tuandv) – Ranked #50
📷 Nguyen Xuan Hoang (@hoangnx99 ) – Ranked #80
Let’s give a huge round of applause

[野村俊輔 | アキレスセキュリティ @nomushun22]

【生成AI × セキュリティ】
ベトナム最大手「ベトテル」グループ会社の
Viettel Cyber Security CEOグエン・ソン・ハイさん、
Cyberzeal CEOの宮原大さん、神澤アシューさんと
弊社メンバーで「生成AIとセキュリティ」について議論しました。

弊社miracleaveは、
Viettel Cyber Security社およびCyberzeal社とアライアンスを組ませていただいています。

昨年末は「セキュリティ」が大きな話題でしたが、ここ数ヶ月は「生成AI」の進化と実用化が主軸になっています。
その裏でセキュリティの脅威は確実に増しています。
・AIで開発や管理が加速する中、セキュリティ対策はどれだけできているのか？
・もしセキュリティ攻撃を受けた場合にオペレーションは機能するのか？

今回の対話を通じて得た気づきを、
miracleaveのサービスや開発に活かしていきます！
@ViettelCyberSec
Interop 2025でご多忙の来日スケジュールの中、弊社までご足労いただき、ありがとうございました！

[TheZDIBugs @TheZDIBugs]

[ZDI-25-652|CVE-2025-53771] (Pwn2Own) Microsoft SharePoint ToolPane Authentication Bypass Vulnerability (CVSS 6.5; Credit: Viettel Cyber Security) https://t.co/PimSmtKc7A

[TheZDIBugs @TheZDIBugs]

[ZDI-25-653|CVE-2025-53770] (Pwn2Own) Microsoft SharePoint Deserialization of Untrusted Data Remote Code Execution Vulnerability (CVSS 8.8; Credit: Viettel Cyber Security) https://t.co/ahrpR294ou

[PR TIMESテクノロジー @PRTIMES_TECH]

Viettel Cyber Security、Microsoft SharePointにおける深刻なゼロデイ脆弱性を発見および警告 https://t.co/VK7MOELkwQ

[Viettel Cyber Security @ViettelCyberSec]

@_l0gg 👏👏👏

[Viettel Cyber Security @ViettelCyberSec]

Our researcher Khoa Dinh just published his findings for ToolShell
Check it here

[Khoa Dinh @_l0gg]

Blog for ToolShell
Disclaimer: The content of this blog is provided for educational and informational purposes only.
https://t.co/gT0aoKXkig
#SharePoint #ToolShell

[Viettel Cyber Security @ViettelCyberSec]

Interop 2025にVCSが登場！
最新のセキュリティソリューションを是非会場でご覧ください。

#interop25

[Viettel Cyber Security @ViettelCyberSec]

🎉 Huge congratulations!
Nguyen Xuan Hoang @hoangnx99 , cybersecurity researcher at VCS, is officially ranked #37 in Microsoft’s Most Valuable Researcher (MVR) Q1/2025! 🏆
With multiple Pwn2Own wins and 3 consecutive years in the MVR Top 100, he’s making waves globally.

🎉おめでとうございます！
VCSのサイバーセキュリティ研究者 Nguyen Xuan Hoang（HoangNX）が、Microsoft Most Valuable Researcher Q1/2025で世界37位にランクイン！🏆
Pwn2Ownの連続受賞、MVRランキング3年連続入りなど世界的に活躍中！
#サイバーセキュリティ #MVR2025

[Viettel Cyber Security @ViettelCyberSec]

🏆🏆 🏆 Huge Congratulations to VCS Cybersecurity Expert Ranked #37 Globally in Microsoft’s Most Valuable Researcher List Q1/2025!
We’re thrilled to celebrate a major milestone as Nguyen Xuan Hoang (HoangNX), a cybersecurity researcher from the VCS Research Team, has officially ranked #37 on the Microsoft Most Valuable Researcher (MVR) list!