Unauthenticated Remote Code Execution on COSLAT Firewall
Priority MEDIUM 50CWE-755Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
Improper Handling of Parameters vulnerability in BG-TEK COSLAT Firewall allows Remote Code Inclusion. This issue affects COSLAT Firewall: from 5.24.0.R.20180630 before 5.24.0.R.20210727.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00865 58th percentileScored 2026-11-07
Fix Fixed COSLAT Firewall (BG-TEK): 5.24.0.r.20210727
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| BG-TEK | COSLAT Firewall | 5.24.0.r.20180630 to before 5.24.0.r.20210727 | 5.24.0.r.20210727 | Patch available | CNA |
- COSLAT Firewall VendorBG-TEK Affected 5.24.0.r.20180630 to before 5.24.0.r.20210727 Fixed in 5.24.0.r.20210727 Patch available CNA
CPE configurations NVD · 16
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:bg-tek:coslat_bx5s1d3_firmware:*:*:*:*:*:*:*:* | 5.24.0.r.20180630 to before 5.24.0.r.20210727 | Vulnerable | BG-TEK |
| cpe:2.3:h:bg-tek:coslat_bx5s1d3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BG-TEK |
| cpe:2.3:o:bg-tek:coslat_bx5s1d4_firmware:*:*:*:*:*:*:*:* | 5.24.0.r.20180630 to before 5.24.0.r.20210727 | Vulnerable | BG-TEK |
| cpe:2.3:h:bg-tek:coslat_bx5s1d4:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BG-TEK |
| cpe:2.3:o:bg-tek:coslat_bx5s1d5_firmware:*:*:*:*:*:*:*:* | 5.24.0.r.20180630 to before 5.24.0.r.20210727 | Vulnerable | BG-TEK |
| cpe:2.3:h:bg-tek:coslat_bx5s1d5:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BG-TEK |
| cpe:2.3:o:bg-tek:coslat_rm1ds1000_firmware:*:*:*:*:*:*:*:* | 5.24.0.r.20180630 to before 5.24.0.r.20210727 | Vulnerable | BG-TEK |
| cpe:2.3:h:bg-tek:coslat_rm1ds1000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BG-TEK |
| cpe:2.3:o:bg-tek:coslat_rm2ds2000_firmware:*:*:*:*:*:*:*:* | 5.24.0.r.20180630 to before 5.24.0.r.20210727 | Vulnerable | BG-TEK |
| cpe:2.3:h:bg-tek:coslat_rm2ds2000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BG-TEK |
- cpe:2.3:o:bg-tek:coslat_bx5s1d3_firmware:*:*:*:*:*:*:*:* Versions 5.24.0.r.20180630 to before 5.24.0.r.20210727 Vulnerable ·BG-TEK
- cpe:2.3:h:bg-tek:coslat_bx5s1d3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BG-TEK
- cpe:2.3:o:bg-tek:coslat_bx5s1d4_firmware:*:*:*:*:*:*:*:* Versions 5.24.0.r.20180630 to before 5.24.0.r.20210727 Vulnerable ·BG-TEK
- cpe:2.3:h:bg-tek:coslat_bx5s1d4:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BG-TEK
- cpe:2.3:o:bg-tek:coslat_bx5s1d5_firmware:*:*:*:*:*:*:*:* Versions 5.24.0.r.20180630 to before 5.24.0.r.20210727 Vulnerable ·BG-TEK
- cpe:2.3:h:bg-tek:coslat_bx5s1d5:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BG-TEK
- cpe:2.3:o:bg-tek:coslat_rm1ds1000_firmware:*:*:*:*:*:*:*:* Versions 5.24.0.r.20180630 to before 5.24.0.r.20210727 Vulnerable ·BG-TEK
- cpe:2.3:h:bg-tek:coslat_rm1ds1000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BG-TEK
- cpe:2.3:o:bg-tek:coslat_rm2ds2000_firmware:*:*:*:*:*:*:*:* Versions 5.24.0.r.20180630 to before 5.24.0.r.20210727 Vulnerable ·BG-TEK
- cpe:2.3:h:bg-tek:coslat_rm2ds2000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BG-TEK
Show 6 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:bg-tek:coslat_rm2s200_firmware:*:*:*:*:*:*:*:* | 5.24.0.r.20180630 to before 5.24.0.r.20210727 | Vulnerable | BG-TEK |
| cpe:2.3:h:bg-tek:coslat_rm2s200:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BG-TEK |
| cpe:2.3:o:bg-tek:coslat_rm3s300_firmware:*:*:*:*:*:*:*:* | 5.24.0.r.20180630 to before 5.24.0.r.20210727 | Vulnerable | BG-TEK |
| cpe:2.3:h:bg-tek:coslat_rm3s300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BG-TEK |
| cpe:2.3:o:bg-tek:coslat_rm4s500_firmware:*:*:*:*:*:*:*:* | 5.24.0.r.20180630 to before 5.24.0.r.20210727 | Vulnerable | BG-TEK |
| cpe:2.3:h:bg-tek:coslat_rm4s500:-:*:*:*:*:*:*:* | not specified by NVD | Running on | BG-TEK |
- cpe:2.3:o:bg-tek:coslat_rm2s200_firmware:*:*:*:*:*:*:*:* Versions 5.24.0.r.20180630 to before 5.24.0.r.20210727 Vulnerable ·BG-TEK
- cpe:2.3:h:bg-tek:coslat_rm2s200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BG-TEK
- cpe:2.3:o:bg-tek:coslat_rm3s300_firmware:*:*:*:*:*:*:*:* Versions 5.24.0.r.20180630 to before 5.24.0.r.20210727 Vulnerable ·BG-TEK
- cpe:2.3:h:bg-tek:coslat_rm3s300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BG-TEK
- cpe:2.3:o:bg-tek:coslat_rm4s500_firmware:*:*:*:*:*:*:*:* Versions 5.24.0.r.20180630 to before 5.24.0.r.20210727 Vulnerable ·BG-TEK
- cpe:2.3:h:bg-tek:coslat_rm4s500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·BG-TEK
Remediation
- Fix · CNA COSLAT Firewall (BG-TEK) Fixed in 5.24.0.r.20210727
Timeline
- 2026-10-02 Threatist record created from CVE-2021-4105
- 2026-10-03 Alias added: GHSA-gr7g-5rvj-cf96
References
Sources
- CVE-2021-4105 · CVE Program
- CVE-2021-4105 · NVD
- FIRST EPSS
- GHSA-gr7g-5rvj-cf96 · 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