CVE-2025-4496

criticalpriority · track · 39EPSS 0.012 · 69 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.23% (69th) EPSS

CVSS 9.8 · critical

Is it mine?

21 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-28

A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.3–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v2.09highAV:N/AC:L/Au:S/C:C/I:C/A:Csecondary · cna@vuldb.comexploitability 8 · impact 10

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · cna@vuldb.comexploitability 2.8 · impact 5.9

v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.08.7highCVSS: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:Xsecondary · cna@vuldb.com

v4.06.3mediumCVSS: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:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-120USprimaryCWE-119USCWE-120US

affected products (21)

Products and version ranges known to be affected.

A3000RU≤ 4.1.8cu.5241_B20210927enisa_euvdEU
A3100R≤ 4.1.8cu.5241_B20210927enisa_euvdEU
A800R≤ 4.1.8cu.5241_B20210927enisa_euvdEU
A810R≤ 4.1.8cu.5241_B20210927enisa_euvdEU
A950RG≤ 4.1.8cu.5241_B20210927enisa_euvdEU
N600R≤ 4.1.8cu.5241_B20210927enisa_euvdEU
T10≤ 4.1.8cu.5241_B20210927enisa_euvdEU
TOTOLink A3000RU≤ 4.1.8cu.5241_B20210927fstec_bduRU
TOTOLink A3100R≤ 4.1.8cu.5241_B20210927fstec_bduRU
TOTOLink A810R≤ 4.1.8cu.5241_B20210927fstec_bduRU
TOTOLink A950RG≤ 4.1.8cu.5241_B20210927fstec_bduRU
TOTOLink T10≤ 4.1.8cu.5241_B20210927fstec_bduRU
Totolink A800R≤ 4.1.8cu.5241_B20210927fstec_bduRU
Totolink N600R≤ 4.1.8cu.5241_B20210927fstec_bduRU
totolink a3000ru firmware= 4.1.8cu.5241_b20210927nvdUScpe:2.3:o:totolink:a3000ru_firmware:*:*:*:*:*:*:*:*
totolink a3100r firmware= 4.1.8cu.5241_b20210927nvdUScpe:2.3:o:totolink:a3100r_firmware:*:*:*:*:*:*:*:*
totolink a800r firmware= 4.1.8cu.5241_b20210927nvdUScpe:2.3:o:totolink:a800r_firmware:*:*:*:*:*:*:*:*
totolink a810r firmware= 4.1.8cu.5241_b20210927nvdUScpe:2.3:o:totolink:a810r_firmware:*:*:*:*:*:*:*:*
totolink a950rg firmware= 4.1.8cu.5241_b20210927nvdUScpe:2.3:o:totolink:a950rg_firmware:*:*:*:*:*:*:*:*
totolink n600r firmware= 4.1.8cu.5241_b20210927nvdUScpe:2.3:o:totolink:n600r_firmware:*:*:*:*:*:*:*:*

showing 20 of 21

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2025-05-10modified 2026-06-17

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+5664 more

references (16)

External citations — patches, advisories, analysis.

scry

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