Synology vulnerabilities2 known to be exploited.
Synology has 293 published vulnerabilities across 92 products in our catalogue. 2 of them are on the list of flaws known to be exploited, so criminals are using them now. The most affected product is Diskstation Manager, with 110. If you run Synology software, patch the exploited flaws first.
The most recent Synology flaw added to the known-exploited list is CVE-2021-3156, on 6 April 2022. We keep watching the known-exploited list.
Which Synology products have the most vulnerabilities?
Diskstation Manager leads with 110 published vulnerabilities. Open a product to see its versions and which of its flaws criminals are already using.
Which Synology vulnerabilities are being exploited?
2 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 7.8Sudo Heap-Based Buffer Overflow Vulnerability
Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation.
- 5.5Microsoft Netlogon Privilege Escalation Vulnerability
Microsoft's Netlogon Remote Protocol (MS-NRPC) contains a privilege escalation vulnerability when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller.
Which Synology flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- >99%
Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single...
- >99%
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC).
- 94%CVE-2017-5753Medium
Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.
- 87%CVE-2019-9515High
Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service.
- 87%CVE-2018-1160Critical
Netatalk before 3.1.12 is vulnerable to an out of bounds write in dsi_opensess.c.
- 86%CVE-2017-14491Critical
Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response.
- 85%CVE-2013-6955Critical
webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently...
- 83%CVE-2019-9514High
Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service.
- 82%CVE-2019-9513High
Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service.
- 77%CVE-2017-9554Medium
An information exposure vulnerability in forget_passwd.cgi in Synology DiskStation Manager (DSM) before 6.1.3-15152 allows remote attackers to enumerate valid usernames via unspecified vectors.
All Synology products we track.
62 products, most vulnerabilities first. Find the ones you run, then open a product to see its versions and exploited flaws.
- Diskstation Managerdiskstation_manager110 vulnerabilities157 versions
- Router Managerrouter_manager54 vulnerabilities68 versions
- Photo Stationphoto_station33 vulnerabilities56 versions
- Skynasskynas29 vulnerabilities1 version
- Vs960hd Firmwarevs960hd_firmware22 vulnerabilities2 versions
- Diskstation Manager Unified Controllerdiskstation_manager_unified_controller17 vulnerabilities3 versions
- Surveillance Stationsurveillance_station17 vulnerabilities57 versions
- Skynas Firmwareskynas_firmware13 vulnerabilities1 version
- Calendarcalendar11 vulnerabilities16 versions
- Download Stationdownload_station8 vulnerabilities34 versions
- Bc500 Firmwarebc500_firmware7 vulnerabilities10 versions
- Tc500 Firmwaretc500_firmware7 vulnerabilities11 versions
- Drive Clientdrive_client6 vulnerabilities33 versions
- Video Stationvideo_station6 vulnerabilities51 versions
- DNS Serverdns_server5 vulnerabilities45 versions
- Media Servermedia_server5 vulnerabilities52 versions
- Note Stationnote_station5 vulnerabilities23 versions
- Active Backup for Business Agentactive_backup_for_business_agent4 vulnerabilities27 versions
- Audio Stationaudio_station4 vulnerabilities31 versions
- Directory Serverdirectory_server4 vulnerabilities5 versions
- Drive Serverdrive_server4 vulnerabilities43 versions
- Radius Serverradius_server4 vulnerabilities1 version
- Carddav Servercarddav_server3 vulnerabilities14 versions
- Chatchat3 vulnerabilities9 versions
This directory lists the 62 Synology products with at least one tracked version, of 92 in our catalogue.
Running Synology? We'll keep checking.
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1 flaw being exploited affects software Acme tracks
Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation.
- Matched to
- Synology on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
Our catalogue lists 293 published vulnerabilities across 92 products and 1,494 versions from Synology. The most recent Synology flaw added to the known-exploited list is CVE-2021-3156, on 6 April 2022.
2 Synology vulnerabilities are on the list of flaws known to be exploited. The most recently added are CVE-2021-3156 and CVE-2020-1472. The full list is on this page.
Diskstation Manager, with 110 published vulnerabilities. Its own page lists the ones known to be exploited.
Create a EdgeProtect account and track the Synology products you run. We match them against every published flaw, give each one a risk score from 0 to 100 and tell you as soon as we spot one that affects you, by email, in the app or by webhook.