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CVE-2023-39780

82
FAUCET Score

CVE-2023-39780 is an OS command injection vulnerability affecting ASUS RT-AX55 routers running firmware version 3.0.0.4.386.51598, allowing authenticated attackers to execute arbitrary commands via the qos_bw_rulelist parameter. This vulnerability has a CVSS score of 8.8 (High), indicating a network-based attack with low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Crucially, this CVE is listed in CISA's KEV catalog, confirming active exploitation in the wild, and has garnered significant community discussion and media coverage, despite no public exploit code being readily available.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.0.4.386.51598CPE matchmatch criteria
cpe:2.3:o:asus:rt-ax55_firmware:3.0.0.4.386.51598:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
33.64%
Probability of exploitation in next 30 days
EPSS Percentile
98.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Added to KEV · Jun 2, 2025
This CVE's current EPSS score of 0.3364 is in the 97th percentile among its peer group of 17,822 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
greynoise.io / blog/stealthy-backdoor-campaign-affecting-asus-routers
ExploitThird Party Advisory
github.com / D2y6p/CVE/blob/main/asus/CVE-2023-39780/1/EN.md
ExploitThird Party Advisory
github.com / D2y6p/CVE/blob/main/asus/CVE-2023-39780/2/EN.md
ExploitThird Party Advisory
github.com / D2y6p/CVE/blob/main/asus/CVE-2023-39780/3/EN.md
ExploitThird Party Advisory
github.com / D2y6p/CVE/blob/main/asus/CVE-2023-39780/4/EN.md
ExploitThird Party Advisory
github.com / D2y6p/CVE/blob/main/asus/CVE-2023-39780/5/EN.md
ExploitThird Party Advisory
github.com / D2y6p/CVE/blob/main/asus/CVE-2023-39780/6/EN.md
ExploitThird Party Advisory