High

CVE-2026-15271 — TOTOLINK EX200 Web boa.conf least privilege violation

A security vulnerability has been detected in TOTOLINK A3000RU, A3100R, A950RG, AC1200T10, CP450, CS185R_T10 and EX200 up to 20260906. Affected by this issue is some unknown functionality of the file /etc/boa/boa.conf of the component Web Interface. The manipulation leads to least privilege violation. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitation is known to be difficult.

Published Jul 9, 2026 · Updated Oct 15, 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 (high)+6

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

Totolink

A3000RU and 6 more

CVSS base

7.5

High · 2 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

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

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 (Totolink A3000RU, Totolink A3100R, Totolink A950RG…).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Totolink	A3000RU	version 20260906	Vulnerable	CVE Program (cve.org) e CISA ADP
Totolink	A3100R	version 20260906	Vulnerable	CVE Program (cve.org) e CISA ADP
Totolink	A950RG	version 20260906	Vulnerable	CVE Program (cve.org) e CISA ADP
Totolink	AC1200T10	version 20260906	Vulnerable	CVE Program (cve.org) e CISA ADP
Totolink	CP450	version 20260906	Vulnerable	CVE Program (cve.org) e CISA ADP
Totolink	CS185R T10	version 20260906	Vulnerable	CVE Program (cve.org) e CISA ADP
Totolink	EX200	version 20260906	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

High

Privileges required

Low

User interaction

None

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
7.7	CVSS 4.0	High	—	—	cna@vuldb.com via NIST National Vulnerability Database
7.7	CVSS 4.0	High	—	—	VulDB via CVE Program (cve.org) e CISA ADP
7.5	CVSS 3.1	High	1.6	5.9	cna@vuldb.com via NIST National Vulnerability Database
7.5	CVSS 3.1	High	—	—	VulDB via CVE Program (cve.org) e CISA ADP
7.5	CVSS 3.0	High	—	—	VulDB via CVE Program (cve.org) e CISA ADP
7.1	CVSS 2.0	High	3.9	10.0	cna@vuldb.com via NIST National Vulnerability Database
7.1	CVSS 2.0	High	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/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-266

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).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · totolink/a3000ru, totolink/a3100r, totolink/a950rg, totolink/ac1200t10, totolink/cp450, totolink/cs185r t10, totolink/ex
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 7.5
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Jul 9, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

12 on the record

vuldb.com/submit/852321
third-party-advisory, NIST National Vulnerability Database
vuldb.com/submit/852318
third-party-advisory, NIST National Vulnerability Database
app.notion.com/p/A3000RU-V5-9c-5185-37a1f5ba989080d38bb6ca58b2a98c64
related, NIST National Vulnerability Database
vuldb.com/vuln/377214
vdb-entry, NIST National Vulnerability Database
vuldb.com/submit/852317
third-party-advisory, NIST National Vulnerability Database
vuldb.com/cve/CVE-2026-15271
third-party-advisory, NIST National Vulnerability Database
vuldb.com/submit/852320
third-party-advisory, NIST National Vulnerability Database
vuldb.com/vuln/377214/cti
signature, permissions-required, NIST National Vulnerability Database
vuldb.com/submit/852319
third-party-advisory, NIST National Vulnerability Database
www.totolink.net/
product, NIST National Vulnerability Database
vuldb.com/submit/852316
third-party-advisory, NIST National Vulnerability Database
vuldb.com/submit/852323
third-party-advisory, NIST National Vulnerability Database

Elsewhere on this site

Totolink
every CVE for this vendor

CWE-266
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-11620 TOTOLINK EX200 vsftpd vsftpd.conf least privilege violation Jun 9, 2026
Medium CVE-2026-11554 TOTOLINK CP450 vsftpd vsftpd.conf least privilege violation Jun 8, 2026

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 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-2026-15271 is "TOTOLINK EX200 Web boa.conf least privilege violation", rated High. It affects A3000RU (Totolink); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.5 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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