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CVE-2026-3729· NVD / CVE Program· CNA VulDB

Tenda F453 PPTPDClient fromPptpUserAdd stack-based overflow

A vulnerability was identified in Tenda F453 1.0.0.3/3.As. Impacted is the function fromPptpUserAdd of the file /goform/PPTPDClient. Such manipulation of the argument username/opttype leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.

HighCVSS 7.4 · v4.0—No exploit No fix recorded

Noroxi analysis

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Published
Mar 8, 2026
Updated
Jun 17, 2026
EPSS
1.0% · 62th percentile
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Report tools

JSON

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
tendaf453 firmware
tendaf453

Affected versions

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

  • tenda f453 firmware1.0.0.3

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 F453

    • 1.0.0.3, 3.Asaffected

Same product

tenda: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-5021Tenda F453 httpd PPTPUserSetting fromPPTPUserSetting stack-based overflow
    29Monitor
  • CVE-2026-4553Tenda F453 Parameters Natlimit fromNatlimit stack-based overflow
    29Monitor
  • CVE-2026-4552Tenda F453 Parameters VirtualSer fromVirtualSer memory corruption
    29Monitor
  • CVE-2026-4551Tenda F453 Parameters SafeClientFilter fromSafeClientFilter memory corruption
    29Monitor
  • CVE-2026-3769Tenda F453 WrlclientSet stack-based overflow
    29Monitor
  • CVE-2026-3768Tenda F453 WrlExtraSet formWrlExtraSet stack-based overflow
    29Monitor

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-2026-37260 days apartTenda F453 webExcptypemanFilter fromwebExcptypemanFilter stack-based overflow
    29Monitor
  • CVE-2026-37270 days apartTenda F453 QuickIndex sub_3C6C0 stack-based overflow
    29Monitor
  • CVE-2026-37280 days apartTenda F453 setcfm fromSetCfm stack-based overflow
    29Monitor
  • CVE-2026-37320 days apartTenda F453 exeCommand strcpy stack-based overflow
    29Monitor
  • CVE-2026-37680 days apartTenda F453 WrlExtraSet formWrlExtraSet stack-based overflow
    29Monitor
  • CVE-2026-37690 days apartTenda F453 WrlclientSet 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

—

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