Critical Injection exploit reference

CVE-2026-113390 — DrayTek Vigor2960 CGI mainfunction.cgi sub_182B0 os command injection

A flaw has been found in DrayTek Vigor2960 1.5.1.6 Revision 8218. Affected by this issue is the function sub_182B0 of the file /cgi-bin/mainfunction.cgi of the component CGI Interface. This manipulation of the argument usefile/usescript/option causes os command injection. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor explains: "2960 1.5.1.7 has corrected many security issues. And 2960 is EoS with limited support, only major issues would be reviewed(e.g. unauthenticated vuln.)". This vulnerability only affects products that are no longer supported by the maintainer.

Published Oct 20, 2026 · Updated Oct 20, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · 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

Technical severity (critical)+10

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

—

No EPSS score.

Affects

DrayTek Corporation

Vigor2960

CVSS base

9.9

Critical · 2 source(s)

Remediation

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

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

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 (DrayTek Corporation Vigor2960).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
DrayTek Corporation	Vigor2960	version 1.5.1.6 Revision 8218	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

Low

User interaction

None

Scope

Changed

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
9.4	CVSS 4.0	Critical	—	—	VulDB via CVE Program (cve.org) e CISA ADP
8.6	CVSS 4.0	High	—	—	cna@vuldb.com via NIST National Vulnerability Database
9.9	CVSS 3.1	Critical	3.1	6.0	cna@vuldb.com via NIST National Vulnerability Database
9.9	CVSS 3.1	Critical	—	—	VulDB via CVE Program (cve.org) e CISA ADP
9.9	CVSS 3.0	Critical	—	—	VulDB via CVE Program (cve.org) e CISA ADP
9.0	CVSS 2.0	High	8.0	10.0	cna@vuldb.com via NIST National Vulnerability Database
9.0	CVSS 2.0	High	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H (score shown at the top: cna@vuldb.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-77 · Command Injection

Other CVEs with this weakness →

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).
Look for parameters with command/query metacharacters and unexpected child processes of the service.

web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Source status changed · Received → Deferred
Oct 20, 2026 · NIST National Vulnerability Database
Affected products added · draytek/vigor2960
Oct 20, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 20, 2026
CVSS changed · 9.9
Oct 20, 2026 · NIST National Vulnerability Database
Source status changed · → Received
Oct 20, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 20, 2026 · Alertas do Telegram
CVE published
Oct 20, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 20, 2026 – Oct 20, 2026
1× Official description updated · Oct 20, 2026 – Oct 20, 2026

References

5 on the record

vuldb.com/submit/992224
third-party-advisory, NIST National Vulnerability Database
vuldb.com/vuln/422666
vdb-entry, technical-description, NIST National Vulnerability Database
vuldb.com/cve/CVE-2026-113390
third-party-advisory, NIST National Vulnerability Database
vuldb.com/vuln/422666/cti
signature, permissions-required, NIST National Vulnerability Database
github.com/yikesoftware/DrayTek_Vigor2960_Security_Analysis/tree/main/cases/DRV2
exploit, NIST National Vulnerability Database

Elsewhere on this site

DrayTek Corporation
every CVE for this vendor

Injection
same class

CWE-77
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-113397 DrayTek Vigor2960 IPsec mainfunction.cgi ruequest_certificate command injection 10h
High CVE-2026-113394 DrayTek Vigor2960 mainfunction.cgi setSWMProfile path traversal 11h
High CVE-2026-113395 DrayTek Vigor2960 swmconfigupload mainfunction.cgi cgiEscape path traversal 11h
High CVE-2026-113396 DrayTek Vigor2960 Rename Table mainfunction.cgi rename_table command injection 11h
Medium CVE-2026-113393 DrayTek Vigor2960 commonupload mainfunction.cgi unrestricted upload 11h
Critical CVE-2026-113391 DrayTek Vigor2960 Upload Endpoint mainfunction.cgi uploadlangs command injection 12h

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 FIRST EPSS score.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
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-2026-113390 is "DrayTek Vigor2960 CGI mainfunction.cgi sub_182B0 os command injection", rated Critical. It affects Vigor2960 (DrayTek Corporation); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 9.9 describes technical severity. 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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