HOMEVULNERABILITIESCVE-2026-31177
CRITICAL

CVE-2026-31177

CWE-78Published: April 23, 2026· Updated: Apr 27, 2026

9.8
CVSS v3.1
EPSS:0.06%probability of exploitation in 30 daysPercentile:18.8th

Official Description

An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the stunMinAlive parameter to /cgi-bin/cstecgi.cgi.

NVD Source

Technical Analysis

CVE-2026-31177 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

totolink2 products
a3300r firmwarea3300r
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-stun-min-alive-cmd-injection
ADVISORYhttps://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-stun-min-alive-cmd-injection

All References (2)

→
https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-stun-min-alive-cmd-injectionExploit · Third Party Advisory
→
https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-stun-min-alive-cmd-injectionExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2026-31177
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-78
CISA KEVNo
EPSS (30d)0.06%
Affected1 vendor
PublishedApr 23, 2026

Related CVEs (CWE-78)

CVE-2026-56415
10.0
CVE-2026-6349
10.0
CVE-2026-33478
KEV10.0
CVE-2026-56004
10.0
CVE-2026-41553
10.0
CVE-2026-34234
KEV10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31177 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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