CVE-2026-121887

Adobe Connect | Improper Restriction of XML External Entity Reference ('XXE') (CWE-611)

Products / packages Adobe Connect

Published 10/11/2026, 21:30:53 UTC

Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 01:50:31 UTC

adobe · CVSS:3.1 · 9.9

Assessment vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Severity

critical9.9

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

Adobe Connect versions up to 12.8, 12.9, 12.10, 12.11, or 12.12 are affected by an Improper Restriction of XML External Entity Reference ('XXE') vulnerability. A low-privileged attacker could exploit this. Exploitation does not require user interaction.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

Exploitation of this issue does not require user interaction.

Excerpt from the original source description below.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Adobe · adobe

Adobe Connect

2 ranges

adobe version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → through 12.8

custom versions

unaffected

12.8.a

custom versions

Other versions: unaffected

Adobe · adobe

Adobe Connect

2 ranges

adobe version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → through 12.9

custom versions

unaffected

12.9.a

custom versions

Other versions: unaffected

Adobe · adobe

Adobe Connect

2 ranges

adobe version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → through 12.10

custom versions

unaffected

12.10.f

custom versions

Other versions: unaffected

Adobe · adobe

Adobe Connect

2 ranges

adobe version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → through 12.11

custom versions

unaffected

12.11.i

custom versions

Other versions: unaffected

Adobe · adobe

Adobe Connect

2 ranges

adobe version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → through 12.12

custom versions

unaffected

12.12.a

custom versions

Other versions: unaffected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

Adobe Connect is affected by an Improper Restriction of XML External Entity Reference ('XXE') vulnerability that could result in arbitrary code execution in the context of the current user. A low-privileged attacker could exploit this vulnerability to execute arbitrary code. Exploitation of this issue does not require user interaction. Scope is changed.

References

1 sources

www.adobe.com/trust/security/products/connect/apsb26-191.html

Vendor advisoryadobe

Inside the record

Evidence available

Package identity · not supplied

Version evidence

Remediation guidance · not supplied

Weakness classification

Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-121887

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-611 ↗

Improper Restriction of XML External Entity Reference ('XXE') (CWE-611)

adobe

Contributing organizations · 2

adobe

Assigning organization

2026-11-10

CISA-ADP

Additional data publisher

2026-11-11

Timeline

All times UTC

10 Nov 2026, 21:30
Advisory published
Publication date supplied by the source.
11 Nov 2026, 10:40
Source updated
Latest modification date supplied by the source.
11 Nov 2026, 11:09
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes

CVE · CVE-2026-1218872026-11-11

Observed 2026-11-11T11:09:45.005Z · upstream updated 2026-11-11T10:40:03.454Z

Prioritization updated

before

[
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-10T00:00:00+00:00",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]

after

[
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-11T04:57:29.579020Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]

CVE · CVE-2026-1218872026-11-11

Observed 2026-11-11T06:17:57.030Z · upstream updated 2026-11-11T04:57:28.729Z

Prioritization updated

before

[]

after

[
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-10T00:00:00+00:00",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

Reading the signals

Severity · CVSS: Technical impact and attack conditions. The headline is the highest imported catalog score; sources may disagree.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: No EPSS estimate available in this record.

CISA-ADP · SSVC

CISA Coordinator · 2026-11-11

Exploitation: none
Automatable: no
Technical Impact: total

SSVC describes the publisher’s decision context. Your organization’s exposure and priorities may differ.

Record identifiers

Aliases: None recorded

Source evidence

Request a correction or dispute

Start with the assigning organization for this record. Include the CVE ID, the disputed information, and supporting evidence. A dispute does not itself reject a record.

Find the responsible CNA →Official dispute and escalation process ↗

CVE CVE-2026-121887