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Fencer Vulns
high 7.2

CVE-2023-35086 in the critical feed json

ASUS RT-AX56U V2 & RT-AC86U - Format String -1

published 2023-07-21 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-39121

cvss
7.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
38.8%
EPSS 38.8% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U. This vulnerability is caused by directly using input as a format string when calling syslog in logmessage_normal function, in the do_detwan_cgi module of httpd. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service.

This issue affects RT-AX56U V2: 3.0.0.4.386_50460; RT-AC86U: 3.0.0.4_386_51529.

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

38.76% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

  • ASUS RT-AX56U V2
  • ASUS RT-AC86U
  • asus rt-ax56u_v2

Classification

Weakness
  • CWE-134 Use of Externally-Controlled Format String

References

Sources

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.