- Description
- An improper authentication vulnerability has been reported to affect VioStor. If a remote attacker, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: VioStor 5.1.6 build 20250621 and later
- Source
- security@qnapsecurity.com.tw
- NVD status
- Analyzed
- Products
- qvr
CVSS 4.0
- Type
- Secondary
- Base score
- 9.3
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity
- CRITICAL
CVSS 3.1
- Type
- Primary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
- security@qnapsecurity.com.tw
- CWE-287
- Hype score
- Not currently trending
#VulnerabilityReport #CVE202552856 QNAP Patches Critical Flaw (CVE-2025-52856) with CVSS 9.3 https://t.co/6BYmJAGmAZ
@Komodosec
5 Oct 2025
54 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
🚨Dos vulnerabilidades críticas en QNAP ⚠️ CVE-2025-52856 ⚠️ CVE-2025-52861 https://t.co/XF5zIilEoS https://t.co/HfU8o5vbjb
@elhackernet
6 Sept 2025
2879 Impressions
7 Retweets
15 Likes
3 Bookmarks
1 Reply
0 Quotes
QNAPのレガシーVioStor NVR（QVR 5.1.x以前）に、認証回避＆パストラバーサル脆弱性（CVE-2025-52856、CVE-2025-52861）発見。管理者権限なしでも侵入可、サーバー内ファイルが丸見えに。最新QVR 5.1.6以降にアップデート必
@Simplex_rm
30 Aug 2025
153 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
QNAPは2025年8月29日、旧型VioStor NVRシステムのQVR 5.1.xファームウェアに存在する2件の深刻な脆弱性に対し、修正版を公開した。 CVE-2025-52856は認証不備により不正ログインを許し、監視映像やシステム操作が外部
@yousukezan
30 Aug 2025
801 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
QNAPは、古いVioStor NVRシステムのQVRファームウェアに影響を与える複数の脆弱性に対処するためのセキュリティパッチをリリースしました。重要な2つの脆弱性（CVE-2025-52856とCVE-2025-52861）が発見され、ユーザー
@cyber_edu_jp
30 Aug 2025
63 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
🚨 CRITICAL: QNAP VioStor 5.1.0 hit by improper authentication bug (CVE-2025-52856, CVSS 9.3)! Remote attackers could fully compromise surveillance systems. Patch to 5.1.6+ now! https://t.co/FIswocjxbS #OffSeq ... https://t.co/1ZUomM6X6z
@offseq
30 Aug 2025
62 Impressions
0 Retweets
0 Likes
1 Bookmark
0 Replies
0 Quotes
CVE-2025-52856 VioStor Remote Authentication Bypass Vulnerability in Versions Prior to 5.1.6 https://t.co/KQ5VCgfkYP
@VulmonFeeds
29 Aug 2025
14 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
CVE-2025-52856 An improper authentication vulnerability has been reported to affect VioStor. If a remote attacker, they can then exploit the vulnerability to compromise the security… https://t.co/cfVrv2UTVu
@CVEnew
29 Aug 2025
222 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
[CVE-2025-52856: CRITICAL] Critical authentication vulnerability in VioStor fixed in version 5.1.6 build 20250621. Ensure system security by updating to the latest version to prevent remote attacks.#cve,CVE-2025-52856,#cybersecurity https://t.co/gPpH6c0swX https://t.co/JfHCVCsBoV
@CveFindCom
29 Aug 2025
48 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
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