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Recorded 23 Oct 2026 at 09:33 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.

The historical “Publicly disclosed: No” field could represent a missing MSRC assessment. It does not establish that the vulnerability was undisclosed. The original recorded fields remain below.

CVEMicrosoft Security Response Center

libexpat Heap Buffer Over-read in xmlparse.c via XML_ParseBuffer

libexpat Heap Buffer Over-read in xmlparse.c via XML_ParseBuffer

What it said

CVE
CVE-2026-77214
Severity
Important
CVSS base score
8.2
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Impact
Not stated
Exploitation detected
Not reported by MSRC
Publicly disclosed
No
Exploitability
Not assessed
Component
Mariner
Weakness
CWE-125: Out-of-bounds Read
Issued by
VulnCheck
Customer action
Required: apply the update
Affected products
azl3 expat 2.8.3-2 on Azure Linux 3.0
Updates that fix it
No KB listed
CISA KEV
Not listed in the collected catalog
EPSS
Not scored
Public exploit code
No Nuclei template listed
Published
9 Oct 2026 01:02 UTC
Last revised
16 Oct 2026 01:50 UTC
Revision note
Information published.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 23 Oct 2026 at 09:33 UTC
CISA KEV
Complete at observationRead 23 Oct 2026 at 09:33 UTC
FIRST EPSS
Complete at observationRead 23 Oct 2026 at 09:33 UTC
Public detection templates (Nuclei)
Complete at observationRead 23 Oct 2026 at 09:33 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

What changed

  1. Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  2. Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  3. Affected products: azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 expat 2.8.3-2 on Azure Linux 3.0 → azl3 expat 2.8.3-2 on Azure Linux 3.0
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (16)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  2. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  3. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  4. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  5. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  6. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  7. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  8. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  9. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  10. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  11. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  12. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  13. 18 Oct 2026 · 14:54:30 UTC Link: October 2026/security?release=2026-Oct#cves
  14. 16 Oct 2026 · 07:41:54 UTC Last revised13 Oct 2026 01:55 UTC → 16 Oct 2026 01:50 UTC
  15. 16 Oct 2026 · 07:41:54 UTC Affected productsazl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 expat 2.8.3-2 on Azure Linux 3.0 → azl3 expat 2.8.3-2 on Azure Linux 3.0
  16. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 1 Nov 09:00 UTC · 272 of 272 readable · 269 fully read · documentation 469/469 current

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