Advisories › Anjvision › ICSA-26-272-05
Anjvision YSSD-RTMP-H5: 9 CVEs, Critical 9.8
Summary
CISA reports 9 vulnerabilities in Anjvision YSSD-RTMP-H5 firmware. Weakness types: Initialization of a Resource with an Insecure Default, Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), Improper Verification of Cryptographic Signature (+6 more). Successful exploitation of these vulnerabilities could allow an attacker to access sensitive information, access user accounts, execute OS-level commands, or take full control over the device. Highest CVSS v3 score: 9.8 (Critical), exploitable over the network.
What to do: Act now: No vendor fix is listed. Follow CISA's recommended practices: keep the devices off the internet, behind firewalls and isolated from business networks, and use secure remote access.
At a glance
- Vendor
- Anjvision
- Products
- YSSD-RTMP-H5 firmware
- CVEs
- CVE-2026-100291, CVE-2026-100292, CVE-2026-100293, CVE-2026-100294, CVE-2026-100295, CVE-2026-100296, CVE-2026-100297, CVE-2026-100298, CVE-2026-100299
- Highest CVSS v3
- 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Highest CVSS v4
- –
- Known exploited (KEV)
- No CVE from this advisory is on the KEV list as of the last refresh
- Sectors (per CISA)
- Commercial Facilities
- Deployed
- Worldwide
- Vendor HQ
- China
Vulnerabilities
| CVE | Weakness | CVSS v3 | CVSS v4 | KEV | Description (from advisory) |
|---|---|---|---|---|---|
| CVE-2026-100291 | Initialization of a Resource with an Insecure Default | 9.8 | – | No | In Anjvision YSSD‑RTMP‑H5 firmware version 3.3.2.4, several ONVIF service endpoints process management requests without enforcing required authentication. This could allow an unauthorized attacker to access sensitive device operations. |
| CVE-2026-100292 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | 8.8 | – | No | In Anjvision YSSD‑RTMP‑H5 firmware version 3.3.2.4, a hidden debug interface can be enabled through an authenticated request, allowing additional commands to be sent to a backend service. Once active, this pathway can unintentionally expose system‑level functionality that could be misused if crafted inputs reach the underlying command handler. |
| CVE-2026-100293 | Improper Verification of Cryptographic Signature | 8.8 | – | No | In Anjvision YSSD‑RTMP‑H5 firmware version 3.3.2.4, both the local and cloud update mechanisms apply new firmware without any cryptographic verification, relying only on basic hashing. This design allows an attacker who can reach the update routine to introduce untrusted firmware images that the device will accept as valid. |
| CVE-2026-100294 | Use of Hard-coded Credentials | 7.5 | – | No | In Anjvision YSSD‑RTMP‑H5 firmware version 3.3.2.4, the firmware embeds hardcoded cloud‑API credentials that are shared across deployed devices. Anyone obtaining the public firmware package can reuse these values to interact with the cloud service in ways not intended for normal operation. |
| CVE-2026-100295 | Active Debug Code | 6.3 | – | No | In Anjvision YSSD‑RTMP‑H5 firmware version 3.3.2.4, an internal debug interface can be enabled through an undocumented pathway, exposing functions not intended for normal operation. When activated, this interface allows actions that could unintentionally provide elevated system access. |
| CVE-2026-100296 | Improper Check for Unusual or Exceptional Conditions | 8.1 | – | No | In Anjvision YSSD-RTMP-H5 firmware version 3.3.2.4, an empty-body POST to /setUserConfig, dispatched through the web server's SOAP-RPC handler, silently downgrades the administrator password to the default value and corrupts the in-memory authentication state until the device reloads. The handler does not verify the session's privilege level, so any authenticated user can trigger it. |
| CVE-2026-100297 | Server-Side Request Forgery (SSRF) | 5.3 | – | No | In Anjvision YSSD‑RTMP‑H5 firmware version 3.3.2.4, an unauthenticated network check function can be triggered to probe arbitrary hosts from the device's internal network. This may expose internal information or leak data via DNS queries. |
| CVE-2026-100298 | Insufficiently Protected Credentials | 8.8 | – | No | In Anjvision YSSD‑RTMP‑H5 firmware version 3.3.2.4, two user‑information endpoints can reveal sensitive device and account details under conditions that are not intended for normal operation. |
| CVE-2026-100299 | Use of Weak Credentials | 6.8 | – | No | In Anjvision YSSD‑RTMP‑H5 firmware version 3.3.2.4, the device includes a legacy password hash on the serial console that relies on a weak DES‑based encryption. |
Affected products (1)
- Anjvision YSSD-RTMP-H5 firmware: 3.3.2.4_build_2024-12-26
Vendor fixes and mitigations (from advisory)
- No Fix Planned: Anjvision has not responded to requests to work with CISA to mitigate these vulnerabilities. Users of affected versions of YSSD-RTMP-H5 are invited to contact Anjvision customer support for additional information http://www.anjvision.com/problem/list-129-cn.html. link
Also apply CISA's standard ICS practices: minimize network exposure, keep control networks behind firewalls and isolated from business networks, and use up-to-date secure remote access.
Sources
This page is generated automatically from the CISA advisory text. It is not a substitute for the vendor's guidance; verify affected versions and fixes at the source before making changes to control systems.