How severe is CVE-2013-4656?

CVE-2013-4656 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2013-4656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4656?

CVE-2013-4656 primarily affects Asus Rt-ac66u Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4656?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2013-4656 published?

CVE-2013-4656 was published on 2019-11-13 and last updated on 2026-06-16.

CVE-2013-4656

CVE-2013-4656 is a critical-severity vulnerability in Asus Rt-ac66u Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Asus Rt-ac66u Firmware
Published: 2019-11-13
Last modified: 2026-06-16

Description

Symlink Traversal vulnerability in ASUS RT-AC66U and RT-N56U due to misconfiguration in the SMB service.

Frequently asked questions

What is CVE-2013-4656?: Symlink Traversal vulnerability in ASUS RT-AC66U and RT-N56U due to misconfiguration in the SMB service.
How severe is CVE-2013-4656?: CVE-2013-4656 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2013-4656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4656?: CVE-2013-4656 primarily affects Asus Rt-ac66u Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2013-4656 published?: CVE-2013-4656 was published on 2019-11-13 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:o:asus:rt-ac66u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-n56u_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Asus Rt-ac66u Firmware

CVE-2013-6343 — Critical (CVSS 10.0): Multiple buffer overflows in web.c in httpd on the ASUS RT-N56U and RT-AC66U routers with firmware 3.0.0.4.374_979…
CVE-2013-4937 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in the AiCloud feature on the ASUS RT-AC66U, RT-N66U, RT-N65U, RT-N14U, RT-N16,…
CVE-2018-8879 — Critical (CVSS 9.8): Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before…
CVE-2018-8826 — Critical (CVSS 9.8): ASUS RT-AC51U, RT-AC58U, RT-AC66U, RT-AC1750, RT-ACRH13, and RT-N12 D1 routers with firmware before 3.0.0.4.380.8228;…
CVE-2018-9285 — Critical (CVSS 9.8): Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U, RT-AC1900, RT-AC2900, and…
CVE-2013-4659 — Critical (CVSS 9.8): Buffer overflow in Broadcom ACSD allows remote attackers to execute arbitrary code via a long string to TCP port 5916.…

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