HOMEVULNERABILITIESCVE-2026-31255
CRITICAL

CVE-2026-31255

Published: April 27, 2026· Updated: Apr 28, 2026

9.8
CVSS v3.1
EPSS:0.27%probability of exploitation in 30 daysPercentile:50.8th

Official Description

A command injection vulnerability exists in Tenda AC18 V15.03.05.05_multi. The vulnerability is located in the /goform/SetSambaCfg interface, where improper handling of the guestuser parameter allows attackers to execute arbitrary system commands.

NVD Source

Technical Analysis

CVE-2026-31255 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

tenda2 products
ac18 firmwareac18
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
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/izxnfirh8148/CVE_REQUESTS_references/blob/main/Tenda_AC18/Tenda_AC18_3th/README.md
ADVISORYhttps://github.com/izxnfirh8148/CVE_REQUESTS_references/blob/main/Tenda_AC18/Tenda_AC18_3th/README.md

All References (2)

→
https://github.com/izxnfirh8148/CVE_REQUESTS_references/blob/main/Tenda_AC18/Tenda_AC18_3th/README.mdExploit · Third Party Advisory
→
https://github.com/izxnfirh8148/CVE_REQUESTS_references/blob/main/Tenda_AC18/Tenda_AC18_3th/README.mdExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2026-31255
CVSS Score9.8 / 10
SeverityCRITICAL
CISA KEVNo
EPSS (30d)0.27%
Affected1 vendor
PublishedApr 27, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31255 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.
← All Vulnerabilities·Search for CVE-2026-31255·NVD