CVE-2026-4903 json
Tenda AC5 POST Request QuickIndex formQuickIndex memory corruption
published 2026-03-26 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-16472
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.7%
- EPSS 5.7% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
A flaw has been found in Tenda AC5 15.03.06.47. This vulnerability affects the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. This manipulation of the argument PPPOEPassword causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been published and may be used.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
5.67% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- lavender-bicycle-a5a.notion.site https://lavender-bicycle-a5a.notion.site/Tenda_AC5_QuickIndex_PPPOEPassword-32053a41781f808dae98f99c99bcb21c?source=copy_link referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R |
| CNA | 3.0 | 8.8 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R |
| CNA | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR |
| CNA | 4.0 | 7.4 | 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 |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
Affected products
- Tenda AC5
Classification
References
-
lavender-bicycle-a5a.notion.site
/Tenda_AC5_QuickIndex_PPPOEPassword-32053a41781f808dae98f99c99bcb21c?source=copy_link
exploit, third-party-advisory
-
vuldb.com
/?id.353654
vdb-entry, technical-description, third-party-advisory
-
vuldb.com
/?ctiid.353654
signature, permissions-required, vdb-entry
-
vuldb.com
/?submit.777380
third-party-advisory, vdb-entry
-
tenda.com.cn
/
product
Sources
- CVE List CVE-2026-4903
- NVD CVE-2026-4903
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.