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CVE-2021-4105

29
FAUCET Score

CVE-2021-4105 is a critical vulnerability affecting BG-TEK COSLAT Firewall versions from 5.24.0.R.20180630 before 5.24.0.R.20210727, stemming from improper handling of parameters that allows for Remote Code Inclusion. With a CVSS score of 9.8, this vulnerability is highly severe, enabling unauthenticated attackers to execute arbitrary code remotely with full impact on confidentiality, integrity, and availability. Despite its critical nature, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.24.0.r.20180630, < 5.24.0.r.20210727CPE matchmatch criteria
cpe:2.3:o:bg-tek:coslat_bx5s1d3_firmware:*:*:*:*:*:*:*:*
>= 5.24.0.r.20180630, < 5.24.0.r.20210727CPE matchmatch criteria
cpe:2.3:o:bg-tek:coslat_bx5s1d4_firmware:*:*:*:*:*:*:*:*
>= 5.24.0.r.20180630, < 5.24.0.r.20210727CPE matchmatch criteria
cpe:2.3:o:bg-tek:coslat_bx5s1d5_firmware:*:*:*:*:*:*:*:*
>= 5.24.0.r.20180630, < 5.24.0.r.20210727CPE matchmatch criteria
cpe:2.3:o:bg-tek:coslat_rm1ds1000_firmware:*:*:*:*:*:*:*:*
>= 5.24.0.r.20180630, < 5.24.0.r.20210727CPE matchmatch criteria
cpe:2.3:o:bg-tek:coslat_rm2ds2000_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.87%
Probability of exploitation in next 30 days
EPSS Percentile
55.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0087 is in the 39th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blog.coslat.com / 2021/07/onemli-kritik-guncelleme-2021-07-27.html
Vendor Advisory
siberguvenlik.gov.tr / guvenlik-bildirimleri/detay/tr-23-0108
usom.gov.tr / bildirim/tr-23-0108
Third Party Advisory