CVE-2026-106931: EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 20 Oct 2026, 6 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 2.5%
EPSS score, percentile 84.8 of all scored records
- How severe?
- 8.5 High
CVSS v4.0 base score, given by the CNA
- What should I do?
CISA deadline 23 Oct 2026. Apply mitigations in accordance with vendor instructions … Full text
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- from Ver2.20 to before Ver8.00 Update 5
- from Ver2.20 to before Ver8.00 Update 5
- from Ver2.20 to before Ver8.00 Update 5
- from Ver4.00 Update 5
- from Ver2.20 to before Ver7.00 Update 6
- from Ver2.20 to before Ver7.00 Update 6
Unaffected from Ver3.10
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA due date for this action: 23 October 2026.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://www.eg-secure.co.jp/siteguard/news/alert-202610-1
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-106931
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from Ver2.20 to before Ver8.00 Update 5 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | from Ver2.20 to before Ver8.00 Update 5 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | from Ver2.20 to before Ver8.00 Update 5 |
| Unaffected | from Ver3.10 |
| Affected | from Ver4.00 Update 5 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | from Ver2.20 to before Ver7.00 Update 6 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | from Ver2.20 to before Ver7.00 Update 6 |
Versions not listed are: unaffected.
Versions the record lists as unaffected: Ver3.10.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
EG Secure Solutions SiteGuard Server Edition contains an OS command injection vulnerability which may allow an attacker to execute arbitrary OS commands with root or SYSTEM privileges on the system running the affected product.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2026-106931 to its Known Exploited Vulnerabilities (KEV) catalog on 20 Oct 2026.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 23 Oct 2026.
- The CVE record was published on 14 Oct 2026, 6 days before it was added to KEV.
- The CVE record carries a CVSS v4.0 base score of 8.5 (High), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 2.5% (percentile 84.8), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
Description
SiteGuard Server Edition contains an OS command injection vulnerability, which may allow an attacker to execute arbitrary OS commands with root or SYSTEM privileges on the system running the affected product.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 14 Oct 2026 | CVE record published |
| 20 Oct 2026 | Added to CISA KEV |
| 21 Oct 2026 | CVE record last updated |
| 23 Oct 2026 | CISA due date for the required action |