Tenda AC18 SetSysAutoRebbotCfg formsetreboottimer buffer overflow

published 2025-06-04 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-16922

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 64%
public exploits: 0; none known

A vulnerability classified as critical has been found in Tenda AC18 15.03.05.05. Affected is the function formsetreboottimer of the file /goform/SetSysAutoRebbotCfg. The manipulation of the argument rebootTime leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 17 mo ago (2025-06-04)

Exploit prediction

1.06% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

lavender-bicycle-a5a.notion.site https://lavender-bicycle-a5a.notion.site/Tenda-AC18-formsetreboottimer-20653a41781f801ab9e2e022dd089d69?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
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	3.0	8.8	CVSS:3.0/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
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: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

Affected products

Tenda AC18

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

lavender-bicycle-a5a.notion.site /Tenda-AC18-formsetreboottimer-20653a41781f801ab9e2e022dd089d69?source=copy_link
exploit, third-party-advisory
vuldb.com /?id.311094
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.311094
signature, permissions-required, vdb-entry
vuldb.com /?submit.588935
third-party-advisory, vdb-entry
tenda.com.cn /
product

Sources

CVE List CVE-2025-5608
NVD CVE-2025-5608

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.

Summary