diff --git a/frontend/src/components/SecurityView.tsx b/frontend/src/components/SecurityView.tsx
index 82e229dc..6d950148 100644
--- a/frontend/src/components/SecurityView.tsx
+++ b/frontend/src/components/SecurityView.tsx
@@ -16,7 +16,7 @@ import { useImageScan } from '@/hooks/useImageScan';
 import { useIsMobile } from '@/hooks/use-is-mobile';
 import { Masthead, type Tone } from './mobile/mobile-ui';
 import { SecurityMobileTabs, type SecurityMobileTab } from './security/SecurityMobile';
-import type { SecurityTab } from '@/lib/events';
+import { SENCHO_SETTINGS_CHANGED, type SecurityTab, type SenchoSettingsChangedDetail } from '@/lib/events';
 import type { ImageFilterValue } from '@/lib/severityStyles';
 import type { SecurityOverview, ScanSummary, ScanDetailTab, SecurityRiskTrendPoint, ExploitIntelFinding, FleetRole, PostureReasonKind } from '@/types/security';
 import { VulnerabilityScanSheet } from './VulnerabilityScanSheet';
@@ -196,8 +196,8 @@ export function SecurityView({ activeTab, onTabChange, headerActions }: Security
         .catch(() => ({ items: [], truncated: false }));
       try {
         const [overviewRes, summariesRes] = await Promise.all([
-          apiFetch('/security/overview'),
-          apiFetch('/security/image-summaries'),
+          apiFetch('/security/overview', { cache: 'no-store' }),
+          apiFetch('/security/image-summaries', { cache: 'no-store' }),
         ]);
         if (cancelled) return;
         if (overviewRes.ok) {
@@ -244,6 +244,20 @@ export function SecurityView({ activeTab, onTabChange, headerActions }: Security
     return () => { cancelled = true; };
   }, [activeNode?.id, reloadToken]);
 
+  // Toggling image-update checks flips overview.updateChecksDisabled, which
+  // gates Check again and the uncertain-row description. Refetch so Overview
+  // does not stay stale until a page reload.
+  useEffect(() => {
+    const handler = (e: Event) => {
+      const keys = (e as CustomEvent<SenchoSettingsChangedDetail>).detail?.changedKeys ?? [];
+      if (keys.includes('image_update_checks_enabled')) {
+        setReloadToken((t) => t + 1);
+      }
+    };
+    window.addEventListener(SENCHO_SETTINGS_CHANGED, handler);
+    return () => window.removeEventListener(SENCHO_SETTINGS_CHANGED, handler);
+  }, []);
+
   // Governance panels (suppressions/acks) are control-governed; probe the local
   // fleet role so a replica renders them read-only, mirroring Settings.
   useEffect(() => {
diff --git a/frontend/src/components/__tests__/SecurityView.settings-refresh.test.tsx b/frontend/src/components/__tests__/SecurityView.settings-refresh.test.tsx
new file mode 100644
index 00000000..bf362882
--- /dev/null
+++ b/frontend/src/components/__tests__/SecurityView.settings-refresh.test.tsx
@@ -0,0 +1,124 @@
+/**
+ * SecurityView must refetch overview when image-update checks are toggled
+ * so Check again and the uncertain-row disabled-checks description are not
+ * stale until a full page reload.
+ */
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render, screen, waitFor, act } from '@testing-library/react';
+
+vi.mock('@/lib/api', () => ({ apiFetch: vi.fn() }));
+vi.mock('@/context/AuthContext', () => ({
+  useAuth: () => ({ can: () => true }),
+}));
+vi.mock('@/context/NodeContext', () => ({
+  useNodes: () => ({
+    activeNode: { id: 1, name: 'local', type: 'local' },
+    hasCapability: () => true,
+    activeNodeMeta: { version: '0.98.0' },
+  }),
+}));
+vi.mock('@/hooks/useImageScan', () => ({
+  useImageScan: () => ({ scanningRef: null, scanImage: vi.fn() }),
+}));
+vi.mock('@/hooks/use-is-mobile', () => ({ useIsMobile: () => false }));
+vi.mock('@/components/security/OverviewTab', () => ({
+  OverviewTab: ({ overview }: { overview: { updateChecksDisabled?: boolean } | null }) => {
+    let label = 'loading';
+    if (overview != null) {
+      label = overview.updateChecksDisabled ? 'disabled' : 'enabled';
+    }
+    return <div data-testid="checks-state">{label}</div>;
+  },
+}));
+vi.mock('@/components/security/ImagesTab', () => ({ ImagesTab: () => null }));
+vi.mock('@/components/security/FindingsTab', () => ({ FindingsTab: () => null }));
+vi.mock('@/components/security/ScanPolicyManager', () => ({ ScanPolicyManager: () => null }));
+vi.mock('@/components/security/ScannerSetupTab', () => ({ ScannerSetupTab: () => null }));
+vi.mock('@/components/security/HistoryTab', () => ({ HistoryTab: () => null }));
+vi.mock('@/components/VulnerabilityScanSheet', () => ({ VulnerabilityScanSheet: () => null }));
+vi.mock('@/components/settings/SuppressionsPanel', () => ({ SuppressionsPanel: () => null }));
+vi.mock('@/components/settings/MisconfigAckPanel', () => ({ MisconfigAckPanel: () => null }));
+
+import { apiFetch } from '@/lib/api';
+import { SENCHO_SETTINGS_CHANGED } from '@/lib/events';
+import { SecurityView } from '../SecurityView';
+
+const mockedFetch = apiFetch as unknown as ReturnType<typeof vi.fn>;
+
+function overviewBody(updateChecksDisabled: boolean) {
+  return {
+    scannedImages: 1,
+    critical: 0,
+    high: 0,
+    fixable: 0,
+    secrets: 0,
+    misconfigs: 0,
+    staleScans: 0,
+    failedScans: 0,
+    lastSuccessfulScanAt: Date.now(),
+    scanner: { available: true, version: '0.50.0', source: 'managed', autoUpdate: true },
+    deployEnforcement: { honorSuppressionsOnDeploy: true, eligibleBlockPolicies: 0 },
+    posture: 'Secure',
+    postureReasons: [],
+    primaryAction: null,
+    updateChecksDisabled,
+  };
+}
+
+function jsonOk(body: unknown) {
+  return Promise.resolve({ ok: true, status: 200, json: async () => body });
+}
+
+beforeEach(() => {
+  mockedFetch.mockReset();
+  let overviewCalls = 0;
+  mockedFetch.mockImplementation((url: string) => {
+    if (url === '/security/overview') {
+      overviewCalls += 1;
+      return jsonOk(overviewBody(overviewCalls > 1));
+    }
+    if (url === '/security/image-summaries') return jsonOk({});
+    if (url === '/security/overview/trend') return jsonOk([]);
+    if (url === '/security/overview/exploit-intel') return jsonOk({ items: [], truncated: false });
+    if (url === '/fleet/role') return jsonOk({ role: 'control' });
+    return Promise.resolve({ ok: false, status: 404, json: async () => ({}) });
+  });
+});
+
+describe('SecurityView settings refresh', () => {
+  it('refetches overview when SENCHO_SETTINGS_CHANGED includes image_update_checks_enabled', async () => {
+    render(<SecurityView activeTab="overview" onTabChange={vi.fn()} />);
+
+    await waitFor(() => expect(screen.getByTestId('checks-state')).toHaveTextContent('enabled'));
+    const overviewCallsBefore = mockedFetch.mock.calls.filter((c) => c[0] === '/security/overview').length;
+
+    await act(async () => {
+      window.dispatchEvent(new CustomEvent(SENCHO_SETTINGS_CHANGED, {
+        detail: { changedKeys: ['image_update_checks_enabled'] },
+      }));
+    });
+
+    await waitFor(() => expect(screen.getByTestId('checks-state')).toHaveTextContent('disabled'));
+    const overviewCalls = mockedFetch.mock.calls.filter((c) => c[0] === '/security/overview');
+    const summaryCalls = mockedFetch.mock.calls.filter((c) => c[0] === '/security/image-summaries');
+    expect(overviewCalls.length).toBeGreaterThan(overviewCallsBefore);
+    for (const call of [...overviewCalls, ...summaryCalls]) {
+      expect(call[1]).toEqual(expect.objectContaining({ cache: 'no-store' }));
+    }
+  });
+
+  it('does not refetch overview for an unrelated settings key', async () => {
+    render(<SecurityView activeTab="overview" onTabChange={vi.fn()} />);
+    await waitFor(() => expect(screen.getByTestId('checks-state')).toHaveTextContent('enabled'));
+    const before = mockedFetch.mock.calls.filter((c) => c[0] === '/security/overview').length;
+
+    await act(async () => {
+      window.dispatchEvent(new CustomEvent(SENCHO_SETTINGS_CHANGED, {
+        detail: { changedKeys: ['developer_mode'] },
+      }));
+    });
+
+    await waitFor(() => expect(screen.getByTestId('checks-state')).toHaveTextContent('enabled'));
+    expect(mockedFetch.mock.calls.filter((c) => c[0] === '/security/overview').length).toBe(before);
+  });
+});