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TI-2026-82522 Aliases CVE-2026-85897GHSA-hhxr-627x-gcwm

Heap-based buffer overflow in Microsoft Edge (Chromium-based)

Priority MEDIUM 41CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

Microsoft Edge (Chromium-based) from 1.0.0.0 before 154.0.4258.37 is affected. A heap-based buffer overflow (CWE-122) lets an unauthorized attacker execute code over a network. User interaction is required.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00573 47th percentileScored 2026-11-07
Fix Fixed Microsoft Edge (Chromium-based) (Microsoft): 154.0.4258.37

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Edge (Chromium-based)1.0.0.0 to before 154.0.4258.37154.0.4258.37Patch availableCNA
  • Microsoft Edge (Chromium-based) VendorMicrosoft Affected 1.0.0.0 to before 154.0.4258.37 Fixed in 154.0.4258.37 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*before 154.0.4258.37VulnerableMicrosoft
  • cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:* Versions before 154.0.4258.37 Vulnerable ·Microsoft

Remediation

Update Microsoft Edge (Chromium-based) to build 154.0.4258.37, released as a security update.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA Microsoft Edge (Chromium-based) (Microsoft) Fixed in 154.0.4258.37

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Edge (Chromium-based)Fixed 154.0.4258.37 · Security Update

Timeline

  1. 2026-10-29 Threatist record created from CVE-2026-85897
  2. 2026-10-29 Alias added: GHSA-hhxr-627x-gcwm
  3. 2026-10-30 CISA SSVC decision points changed
  4. 2026-10-30 Priority changed: MEDIUM → LOW
  5. 2026-10-30 CISA SSVC decision points changed
  6. 2026-10-31 Priority changed: LOW → MEDIUM

References

Patch 1

  • TI-2023-05824 Integer overflow in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2022-03781 Out-of-bounds write in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2025-12953 Memory corruption in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2025-04867 Out-of-bounds read in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2024-07384 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 325 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences