Adobe Connect | Improper Restriction of XML External Entity Reference ('XXE') (CWE-611)
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Adobe Connect 12.12 and earlier on Windows
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 21/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Adobe Connect contains an XML external entity (XXE) flaw that lets a remote attacker with low-privilege credentials read arbitrary files on the server, including sensitive files and directories outside their intended access scope. No user interaction is required to carry out the attack.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
Adobe Connect is affected by an Improper Restriction of XML External Entity Reference ('XXE') vulnerability that could lead to arbitrary file system read. A low-privileged attacker could exploit this vulnerability to access sensitive files and directories outside the intended access scope. Exploitation of this issue does not require user interaction. Scope is changed.
Who should check
Teams running Adobe Connect 12.12 and earlier on Windows
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity7.7/10CVSS 7.7
- No patch5/5No patch listed yet
What would change the score
- Would score about 71 if added to CISA KEV
- Would score about 66 if CISA's SSVC rates exploitation active
- Would score about 28 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Adobe Connect 12.12 and earlier on WindowsWorkaround: The checked facts do not include a workaround or mitigation from Adobe. Until a fix is released, limit access to the Adobe Connect server and follow Adobe's current security guidance for the affected version.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-121890 (Adobe Connect | Improper Restriction of XML External Entity Reference ('XXE') (CWE-611)), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-121890 (entry last updated 2026-11-10):
Affected:
- Adobe Adobe Connect: through 12.8
- Adobe Adobe Connect: through 12.9
- Adobe Adobe Connect: through 12.10
- Adobe Adobe Connect: through 12.11
- Adobe Adobe Connect: through 12.12
Fixed versions: none listed yet.
Conditions (all must be true for the bug to be hit):
- Adobe Connect 12.12 and earlier on Windows (source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, low-privilege login, no user action.
CISA KEV: CVE-2026-121890 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-121890 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://www.adobe.com/trust/security/products/connect/apsb26-191.html
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-121890
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-121890.Timeline
- CVE published
- First seen by cve.now
Affected versions
- Adobe Adobe Connect
through 12.8
- Adobe Adobe Connect
through 12.9
- Adobe Adobe Connect
through 12.10
- Adobe Adobe Connect
through 12.11
- Adobe Adobe Connect
through 12.12
Evidence 3
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Advisory
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-121890
Is CVE-2026-121890 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
A flaw in how Adobe Connect parses XML lets it load external entity references, which can let a reader pull files and directories from outside the intended scope on the server's file system.Source: adobe.com
Which versions are affected by CVE-2026-121890?
Adobe Connect: through 12.8. Adobe Connect: through 12.9. Adobe Connect: through 12.10. Adobe Connect: through 12.11. Adobe Connect: through 12.12.Source: cve.now feed data
Am I affected, and how do I check?
Adobe Connect 12.12 and earlier on Windows are listed as affected, with version lines from 12.8 through 12.12 in the advisory data. To check a installation, look at the Adobe Connect version shown in the admin console or installed package; the advisory's conditions name Windows as the platform.Source: adobe.com
How do I fix CVE-2026-121890?
No fixed version is listed in the checked facts, so the advisory's patched release should be confirmed directly with Adobe before upgrading. Keep Adobe Connect on the latest release Adobe publishes once it is available.Source: adobe.com
What if there's no patch?
The checked facts do not include a workaround or mitigation from Adobe. Until a fix is released, limit access to the Adobe Connect server and follow Adobe's current security guidance for the affected version.Source: adobe.com