High Memory corruption exploit reference

CVE-2026-116099 — Fusion Creators Studio SCP Containment Breach Multiplayer Skynet++ Virtual Machine BlitzBanks out-of-bounds write

A flaw has been found in Fusion Creators Studio SCP Containment Breach Multiplayer up to 1.295. This issue affects the function BlitzBanks of the component Skynet++ Virtual Machine. Executing a manipulation can lead to out-of-bounds write. The attack can be executed remotely. The exploit has been published and may be used. Upgrading to version 1.3R is capable of addressing this issue. It is recommended to upgrade the affected component.

Published Oct 25, 2026 · Updated Oct 29, 2026 · Sources: CVE Program (cve.org) e CISA ADP, NIST National Vulnerability Database, GitHub Security Advisories · CNA: VulDB

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.4% (30-day exploitation probability)+5
Technical severity (high)+6
CISA SSVC: exploitation "poc"+5
Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.38%

ahead of 32% of scored CVEs · Oct 29, 2026

Affects

Fcs-ex

Scp:containment Breach Multiplayer and 1 more

CVSS base

8.8

High · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

Yes

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — steamdb.info (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Fcs-ex Scp:containment Breach Multiplayer, Fusion Creators Studio SCP Containment Breach Multiplayer).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
Apply the fixed version or the patch documented under Remediation.
Exploitation requires user interaction: tighten email/web filtering and warn affected users.
Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Fcs-ex	Scp:containment Breach Multiplayer	≤ 1.295	Vulnerable	NIST National Vulnerability Database
Fusion Creators Studio	SCP Containment Breach Multiplayer	version 1.295	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
5.3	CVSS 4.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
2.1	CVSS 4.0	Low	—	—	cna@vuldb.com via NIST National Vulnerability Database
8.8	CVSS 3.1	High	2.8	5.9	nvd@nist.gov via NIST National Vulnerability Database
6.3	CVSS 3.1	Medium	2.8	3.4	cna@vuldb.com via NIST National Vulnerability Database
6.3	CVSS 3.1	Medium	—	—	GitHub, Inc. via GitHub Security Advisories
6.3	CVSS 3.1	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
6.3	CVSS 3.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
7.5	CVSS 2.0	High	10.0	6.4	cna@vuldb.com via NIST National Vulnerability Database
7.5	CVSS 2.0	High	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 8.8 (NVD (NIST)) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-119 · Buffer Errors (Improper Restriction of Operations within Memory Bounds)

Other CVEs with this weakness →

EPSS over time FIRST

Oct 26, 2026 → Oct 29, 2026 · 4 reading(s) · max 0.38%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.

web/proxy/WAF logsnetwork IDS/IPSendpoint telemetry (EDR)crash dumps

Timeline

What happened to this CVE, newest first.

2026
CVSS changed · 9.8 → 8.8
Oct 29, 2026 · NIST National Vulnerability Database
Fix documented
Oct 28, 2026 · NIST National Vulnerability Database
Affected products added · fcs-ex/scp:containment breach multiplayer
Oct 28, 2026 · NIST National Vulnerability Database
CVSS changed · 6.3 → 9.8
Oct 28, 2026 · NIST National Vulnerability Database
Source status changed · Undergoing Analysis → Analyzed
Oct 28, 2026 · NIST National Vulnerability Database
Source status changed · Deferred → Undergoing Analysis
Oct 28, 2026 · NIST National Vulnerability Database
SSVC assessment updated
Oct 26, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · Received → Deferred
Oct 26, 2026 · NIST National Vulnerability Database
Source status changed · Published → Received
Oct 25, 2026 · NIST National Vulnerability Database
Record published
Oct 25, 2026
CVSS changed · 6.3
Oct 25, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Published
Oct 25, 2026 · CVE Program (cve.org) e CISA ADP
Record created in this database
Oct 25, 2026 · CVE Program (cve.org) e CISA ADP
CVE published
Oct 25, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 25, 2026 – Oct 25, 2026
1× Official description updated · Oct 25, 2026 – Oct 25, 2026

References

11 on the record

steamdb.info/patchnotes/25701366/
broken-link, patch, Patch, CVE Program (cve.org) e CISA ADP
drbloop.dev/blog/one-click-remote-code-execution-in-scp-containment-breach-mutipl
related, Exploit, Issue Tracking, Third Party Advisory, CVE Program (cve.org) e CISA ADP
vuldb.com/cve/CVE-2026-116099
third-party-advisory, Third Party Advisory, VDB Entry, CVE Program (cve.org) e CISA ADP
vuldb.com/vuln/426167
vdb-entry, technical-description, Third Party Advisory, VDB Entry, CVE Program (cve.org) e CISA ADP
github.com/drbloop2000/SCP-CBM-RCE/tree/main
exploit, Exploit, Issue Tracking, CVE Program (cve.org) e CISA ADP
github.com/advisories/GHSA-2424-3jrj-v5gr
GitHub Security Advisories
vuldb.com/vuln/426167/cti
signature, permissions-required, Third Party Advisory, VDB Entry, CVE Program (cve.org) e CISA ADP
steamdb.info/patchnotes/25701366
GitHub Security Advisories
nvd.nist.gov/vuln/detail/CVE-2026-116099
GitHub Security Advisories
vuldb.com/submit/1001276
third-party-advisory, Third Party Advisory, VDB Entry, CVE Program (cve.org) e CISA ADP
store.steampowered.com/news/app/1782380/view/670629296167978253
related, Issue Tracking, CVE Program (cve.org) e CISA ADP

Elsewhere on this site

Fcs-ex
every CVE for this vendor

Memory corruption
same class

CWE-119
other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-116099 is "Fusion Creators Studio SCP Containment Breach Multiplayer Skynet++ Virtual Machine BlitzBanks out-of-bounds write", rated High. It affects Scp:containment Breach Multiplayer (Fcs-ex); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.8 describes technical severity. EPSS 0.38% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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