CVE-2025-15255

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

4.55% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 90.9% of scored records. A rank, not a probability.

NVD base score

8.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-12-30 16:02Z8 MO AGO

Last updated

2026-02-24 06:17Z6 MO AGO

Reserved

2025-12-29

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-121Stack-based Buffer OverflowVariant

Data version

5.2

Document digest

900d3471ff5a9cefafeb0f1b2c755d0951a70b127d059bee4db6379159d7f868

• vuldb.comVDB-338645 | Tenda W6-S R7websSsecurityHandler httpd stack-based overflowhttps://vuldb.com/?id.338645vdb-entrytechnical-description
• vuldb.comVDB-338645 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/?ctiid.338645signaturepermissions-required
• vuldb.comSubmit #725500 | Tenda W6-S V1.0.0.4(510) Stack-based Buffer Overflowhttps://vuldb.com/?submit.725500third-party-advisory
• github.comhttps://github.com/dwBruijn/CVEs/blob/main/Tenda/R7WebsSecurityHandler.mdexploit
• www.tenda.com.cnhttps://www.tenda.com.cn/product