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CVE-2026-4534· NVD / CVE Program· CNA VulDB

Tenda FH451 WrlExtraSet formWrlExtraSet stack-based overflow

A flaw has been found in Tenda FH451 1.0.0.9. This affects the function formWrlExtraSet of the file /goform/WrlExtraSet. This manipulation of the argument GO causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been published and may be used.

HighCVSS 7.4 · v4.0—No exploit No fix recorded
Published
Mar 22, 2026
Updated
Jun 17, 2026
EPSS
1.0% · 62th percentile
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Action score

29

Monitor

Low priority for now.

CVSS
29 / 40 · 7.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.0%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulDB
8.7
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
tendafh451 firmware
tendafh451

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • tenda fh451 firmware1.0.0.9

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulDB). Independent of NVD's CPE analysis and usually ahead of it.

  • Tenda FH451

    • 1.0.0.9affected

Same product

tenda: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-46048Tenda FH451 v1.0.0.9 has a command injection vulnerability in the formexeCommand function i
    42Plan
  • CVE-2025-45513Tenda FH451 V1.0.0.9 has a stack overflow vulnerability in the function.P2pListFilter.
    39Monitor
  • CVE-2024-46046Tenda FH451 v1.0.0.9 has a stack overflow vulnerability located in the RouteStatic function.
    39Monitor
  • CVE-2025-7855Tenda FH451 qossetting fromqossetting stack-based overflow
    34Monitor
  • CVE-2025-5080Tenda FH451 webExcptypemanFilter stack-based overflow
    34Monitor
  • CVE-2025-7795Tenda FH451 P2pListFilter fromP2pListFilter stack-based overflow
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-7855246 days apartTenda FH451 qossetting fromqossetting stack-based overflow
    34Monitor
  • CVE-2025-5080304 days apartTenda FH451 webExcptypemanFilter stack-based overflow
    34Monitor
  • CVE-2025-7795247 days apartTenda FH451 P2pListFilter fromP2pListFilter stack-based overflow
    30Monitor
  • CVE-2026-45350 days apartTenda FH451 WrlclientSet stack-based overflow
    29Monitor
  • CVE-2026-367715 days apartTenda FH451 setcfm fromSetCfm stack-based overflow
    29Monitor
  • CVE-2026-367815 days apartTenda FH451 AdvSetWan sub_3C434 stack-based overflow
    29Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records