spx_restservice KillDupUsr_func Broken Access Control
Priority LOW 34CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.
Summary
A broken access control vulnerability in the KillDupUsr_func function of spx_restservice allows an attacker to arbitrarily terminate active sessions of other users, causing a Denial-of-Service (DoS) condition, if an input parameter is correctly guessed. This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00793 56th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Lanner Inc | IAC-AST2500A | 1.10.0 | — | No fix listed | CNA |
- IAC-AST2500A VendorLanner Inc Affected 1.10.0 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:lannerinc:iac-ast2500a_firmware:1.10.0:*:*:*:*:*:*:* | 1.10.0 | Vulnerable | Lanner Inc |
| cpe:2.3:h:lannerinc:iac-ast2500a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Lanner Inc |
- cpe:2.3:o:lannerinc:iac-ast2500a_firmware:1.10.0:*:*:*:*:*:*:* Versions 1.10.0 Vulnerable ·Lanner Inc
- cpe:2.3:h:lannerinc:iac-ast2500a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Lanner Inc
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-44467
- 2026-10-03 Alias added: GHSA-wwhw-grq6-66rj
References
More Lanner Inc Iac-ast2500a Firmware vulnerabilities
- TI-2021-08409 spx_restservice modifyUserb_func Command Injection and Multiple Stack-Based Buffer Overflows CVSS 3.1CRITICAL 9.8
- TI-2021-08407 spx_restservice Login_handler_func Command Injection and Multiple Stack-Based Buffer Overflows CVSS 3.1CRITICAL 10.0
- TI-2021-08406 spx_restservice KillDupUsr_func Command Injection and Stack-Based Buffer Overflow CVSS 3.1CRITICAL 10.0
- TI-2021-08405 spx_restservice SubNet_handler_func Multiple Command Injections and Stack-Based Buffer Overflows CVSS 3.1CRITICAL 10.0
- TI-2021-08408 spx_restservice Login_handler_func Subfunction Stack-Based Buffer Overflow CVSS 3.1CRITICAL 10.0
- TI-2021-21143 Session Fixation and Insufficient Session Expiration CVSS 3.1HIGH 8.8
Sources
- CVE-2021-44467 · CVE Program
- CVE-2021-44467 · NVD
- FIRST EPSS
- GHSA-wwhw-grq6-66rj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences