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CVE-2025-4835· NVD / CVE Program· CNA VulDB

TOTOLINK A702R/A3002R/A3002RU HTTP POST Request formWlanRedirect buffer overflow

A vulnerability was found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /boafrm/formWlanRedirect of the component HTTP POST Request Handler. The manipulation of the argument redirect-url leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

HighCVSS 8.7 · v4.0—No exploit No fix recorded
Published
May 17, 2025
Updated
Jun 17, 2026
EPSS
0.8% · 55th percentile
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Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
none
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

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

Affected systems

VendorProduct
totolinka702r firmware
totolinka702r
totolinka3002r firmware
totolinka3002r
totolinka3002ru firmware
totolinka3002ru

Affected versions

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

  • totolink a3002r firmware3.0.0-b20230809.1615
  • totolink a3002ru firmware3.0.0-b20230809.1615
  • totolink a702r firmware3.0.0-b20230809.1615

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.

  • TOTOLINK A3002R

    • 3.0.0-B20230809.1615affected

  • TOTOLINK A3002RU

    • 3.0.0-B20230809.1615affected

  • TOTOLINK A702R

    • 3.0.0-B20230809.1615affected

Same product

totolink: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-4834TOTOLINK A702R/A3002R/A3002RU HTTP POST Request formSetLg buffer overflow
    34Monitor
  • CVE-2025-4833TOTOLINK A702R/A3002R/A3002RU HTTP POST Request formNtp buffer overflow
    34Monitor
  • CVE-2025-4832TOTOLINK A702R/A3002R/A3002RU HTTP POST Request formDosCfg buffer overflow
    34Monitor
  • CVE-2025-4831TOTOLINK A702R/A3002R/A3002RU HTTP POST Request formSiteSurveyProfile buffer overflow
    34Monitor
  • CVE-2025-4830TOTOLINK A702R/A3002R/A3002RU HTTP POST Request formSysCmd buffer overflow
    34Monitor
  • CVE-2025-4829TOTOLINK A702R/A3002R/A3002RU HTTP POST Request formStats sub_40BE30 buffer overflow
    34Monitor

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-2025-48270 days apartTOTOLINK A702R/A3002R/A3002RU HTTP POST Request formSaveConfig buffer overflow
    34Monitor
  • CVE-2025-48290 days apartTOTOLINK A702R/A3002R/A3002RU HTTP POST Request formStats sub_40BE30 buffer overflow
    34Monitor
  • CVE-2025-48300 days apartTOTOLINK A702R/A3002R/A3002RU HTTP POST Request formSysCmd buffer overflow
    34Monitor
  • CVE-2025-48310 days apartTOTOLINK A702R/A3002R/A3002RU HTTP POST Request formSiteSurveyProfile buffer overflow
    34Monitor
  • CVE-2025-48320 days apartTOTOLINK A702R/A3002R/A3002RU HTTP POST Request formDosCfg buffer overflow
    34Monitor
  • CVE-2025-48330 days apartTOTOLINK A702R/A3002R/A3002RU HTTP POST Request formNtp buffer overflow
    34Monitor

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:X/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