CVE-2025-11091

Tenda AC21 SetStaticRouteCfg sscanf buffer overflow

HIGH
8.8
CVSS Score
Published: September 28, 2025 at 01:32 AM UTC
Updated: October 9, 2026 at 10:10 AM UTC
1 product affected across 1 vendorAC21 Firmware· also runs on 1 platform

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Severity
HIGH8.8
Exploit prediction
EPSS 0.8%
SSVC
PoC

Description

A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/?id.326173
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/?ctiid.326173
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/?submit.661806
ExploitIssue Tracking
Source: cverecord
https://github.com/maximdevere/CVE2/issues/2
Product
Source: cverecord
https://www.tenda.com.cn/

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHVulDB
Vector?

Quick Info

StatusANALYZED
CWE
CWE-120CWE-119

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