Threats / Adobe / CVE-2023-26359
CVE-2023-26359
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Adobe ColdFusion vulnerability
Adobe ColdFusion contains a deserialization of untrusted data vulnerability allowing remote code execution in the context of the current user.
Verdict
Today item — known-exploited.
An attacker can exploit unsafe deserialization in ColdFusion to execute arbitrary code with user privileges. Active exploitation in the wild increases risk. Immediate patching is critical for affected deployments.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
4 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-08-21).
Probability (EPSS)
EPSS 0.17937 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Adobe, ColdFusion. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-502 Deserialization of Untrusted Data — weakness family: Injection.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious serialized object and send it to a ColdFusion application endpoint that deserializes untrusted input.
Business
An unauthenticated remote attacker gains code execution capability on the server.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute arbitrary commands within the security context of the ColdFusion application user account.
Business
The attacker can read, modify, or delete sensitive data accessible to that user account, including databases and configuration files.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish persistence or pivot to other systems on the internal network using the compromised ColdFusion server.
Business
The breach expands beyond the initial server, potentially compromising the entire infrastructure and customer data.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05