CASCACascade Atlas

Evidence dossier

CVE-2026-106931

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…

Exploited in the wild (CISA KEV since Oct 20, 2026). jpcert reports CVSS 4.0 8.5. EPSS estimates 1.2% exploit likelihood as of Oct 22, 2026.

63.4–76.0Priority evidence range
Evidence through Oct 22, 2026, 6:07 PM UTC

As of Oct 22, 2026

Normalized restatement

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.

State
PUBLISHED
Published
Oct 14, 2026
Updated
Oct 21, 2026
Evidence coverage
85%

Evidence chronology

What was known when

Download this view's receipt →
  1. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    jpcert

    Record text: 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.

    Inspect raw assertion
    Field
    container
    Value
    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.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 1.17% probability · 67.15th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.011700000000; percentile 0.671490000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Oct 20, 2026 · first observed Oct 21, 2026

Exploit likelihood1.17%

FIRST EPSS · score date Oct 22, 2026 · 67.1th percentile · first observed Oct 22, 2026

SeverityCVSS 8.5

jpcert · CVSS 4.0 · first observed Oct 21, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

casca-unknown-reasons-v1
Exploitation statusLast verified source snapshot retained

The last verified source boundary remains in force for this claim.

Revision
evidence-policy-v1.1.0
Cutoff
Oct 22, 2026
Resolution
Review source contract
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Oct 22, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Oct 22, 2026
Resolution
None
Affected productsSource-reported scope

The cited source assertion is retained while canonical product linkage remains open.

Revision
casca-factor-d-obligations-v1
Cutoff
Oct 22, 2026
Resolution
Resolve identity

Source comparison

Who said what

CISA KEVOriginal assertion
Exploitation cataloged

EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
CISA-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
jpcertOriginal assertion
Record text

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.

Inspect raw assertion
Field
container
Value
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 dateSource date omittedFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

1.17% probability · 67.15th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.011700000000; percentile 0.671490000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →

34 scope groups

jpcert · source assertedEG Secure Solutions Inc.SiteGuard Server Edition for Apache httpdDirect source scope
Affected: Ver2.20 to before Ver8.00 Update 5 (semver comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "Ver2.20", "lessThan": "Ver8.00 Update 5", "versionType": "semver"}]
jpcert · source assertedEG Secure Solutions Inc.SiteGuard Server Edition for Apache httpd on FreeBSDDirect source scope
Affected: Ver2.20 to before Ver7.00 Update 6 (semver comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "Ver2.20", "lessThan": "Ver7.00 Update 6", "versionType": "semver"}]
jpcert · source assertedEG Secure Solutions Inc.SiteGuard Server Edition for IISDirect source scope
Affected: Ver2.20 to before Ver8.00 Update 5 (semver comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "Ver2.20", "lessThan": "Ver8.00 Update 5", "versionType": "semver"}]
jpcert · source assertedEG Secure Solutions Inc.SiteGuard Server Edition for NginxDirect source scope
Affected: Ver2.20 to before Ver8.00 Update 5 (semver comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "Ver2.20", "lessThan": "Ver8.00 Update 5", "versionType": "semver"}]
jpcert · source assertedEG Secure Solutions Inc.SiteGuard Server Edition for Nginx on FreeBSDDirect source scope
Affected: Ver2.20 to before Ver7.00 Update 6 (semver comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "Ver2.20", "lessThan": "Ver7.00 Update 6", "versionType": "semver"}]
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:-:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:-:*:*:server:nginx:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update1:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update1:*:*:server:nginx:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update2:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update2:*:*:server:nginx:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update3:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update3:*:*:server:nginx:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update4:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update4:*:*:server:nginx:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update5:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:7.00:update5:*:*:server:nginx:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:8.00:-:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:8.00:-:*:*:server:nginx:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:8.00:update1:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:8.00:update1:*:*:server:nginx:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:8.00:update2:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:8.00:update2:*:*:server:nginx:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:8.00:update3:*:*:server:apache:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:e-guardian:siteguard:8.00:update3:*:*:server:nginx:*:*

Affected-product evidence

Accepted scope and product mapping

0 canonical links · 2 source-reported links

Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class
Direct cve affected
Assertions
5
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Oct 22, 2026
Retained assertion IDs
0431dc15-74c3-415f-b086-b42f9b93eba016446a45-d440-450b-9d88-31fedb42b33e27eb132a-c39e-4e41-b47a-585c89cd7871d11fa5fd-bd1d-42da-99b5-45a537363a95f87846c2-f749-48ed-92a6-dabb6f01814b
Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class
Nvd cpe vulnerable target
Assertions
27
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Oct 22, 2026
Retained assertion IDs
0d549136-71db-4d63-8c9c-1d3860fa52472c7e2156-fec3-4273-92a9-0cf1c45e388735463886-5cb6-4b9b-b55d-624f7f23c45e3c84b05c-41fd-4749-b60f-546bc93b0b3a4172b782-2889-41cd-8dc3-fb4149d0e68d4b669126-7d71-444d-8eed-c4a4fdfc231e60e170a9-9383-4e3a-ad92-b886e22efd9e628a9a19-bf69-469b-a7fe-628235b7f7046bae67b2-bf6e-4a92-bd69-f29e4f015bea73648cd4-6d42-48d1-bfdf-66e1cb253712780fb4c4-da54-4405-9a31-d48f2a50dcec7b135063-a334-4971-8943-c4221262faeb874f2c80-9e3e-4260-89fd-597a8852b1568774ea28-384e-483d-b29b-77ac1744c3e08b0d1bd3-4e43-4862-85a4-27cec58b99eb8c3e549e-06e1-4341-ad75-3bb46aaa23598c59ba07-6c6e-463e-afbb-1c42e812bbc49764eacc-9ca2-4621-b4cf-4a95a4fc1a6f9c9c6a32-509a-4d5f-8c00-670aae4eb2e9a969ecc8-c1a4-4c82-a106-95c8412a6902ba1a8d56-d552-4f9a-86d4-65f3bb3d5c67bbe5847a-c91b-4e0f-bb89-ca9916d6f929c23a645f-c67c-4eda-bf80-38136f85ece0c923f6d4-c684-4088-8b7f-489e56f73f75ca038f49-f636-426d-814f-0345270a35f2e59cbb22-f3e5-450d-a93b-5caa396294cdec4d9563-dac7-4f17-aa08-40e3119ae86c

Assessments

CVSS by origin

8.5
vultures@jpcert.or.jpCVSS 4.0 · role Secondary · priority eligiblevalid_matchCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
7.8
vultures@jpcert.or.jpCVSS 3.0 · role Secondary · priority eligiblevalid_matchCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5
jpcertCVSS 4.0 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8
jpcertCVSS 3.0 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

8.5Priority eligible

jpcert

CVSS 4.0 · Primary · Original assertion · rank 1

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Validation
Valid match
Recomputed
8.5
Decision reason
Evidence supported
Policy
casca-direct-cvss-eligibility-v1
7.8Priority eligible

jpcert

CVSS 3.0 · Primary · Original assertion · rank 1

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
7.8
Decision reason
Evidence supported
Policy
casca-direct-cvss-eligibility-v1

Assessments are retained side by side under closed precedence. Cascade never averages CVSS.

Evidence boundaries

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
  • NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
  • OSV aggregation and OSV-converted NVD material are not independent corroboration.
  • Red Hat facts are vendor assertions for the exact supplied products.
  • Nonmembership and not-yet-observed states are not proof of safety.