spx_restservice KillDupUsr_func Command Injection and Stack-Based Buffer Overflow
Priority MEDIUM 48CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
Command injection and stack-based buffer overflow vulnerabilities in the KillDupUsr_func function of spx_restservice allow an attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.
Why it matters now
EPSS 0.02653 85th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
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-2021-26728
- 2026-10-03 Alias added: GHSA-4pjq-m8x4-557r
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-2021-08405 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
- TI-2021-20076 spx_restservice KillDupUsr_func Broken Access Control CVSS 3.1HIGH 7.5
Sources
- CVE-2021-26728 · CVE Program
- CVE-2021-26728 · NVD
- FIRST EPSS
- GHSA-4pjq-m8x4-557r · 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