How severe is CVE-2018-15553?

CVE-2018-15553 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-15553 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15553?

CVE-2018-15553 affects Telus Actiontec T2200h Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15553?

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

When was CVE-2018-15553 published?

CVE-2018-15553 was published on 2018-08-20 and last updated on 2026-06-17.

CVE-2018-15553

CVE-2018-15553 is a high-severity vulnerability in Telus Actiontec T2200h Firmware with a CVSS 3.x base score of 8.8. 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-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Telus Actiontec T2200h Firmware
Published: 2018-08-20
Last modified: 2026-06-17

Description

fileshare.cmd on Telus Actiontec T2200H T2200H-31.128L.03 devices allows OS Command Injection via shell metacharacters in the smbdUserid or smbdPasswd field.

Frequently asked questions

What is CVE-2018-15553?: fileshare.cmd on Telus Actiontec T2200H T2200H-31.128L.03 devices allows OS Command Injection via shell metacharacters in the smbdUserid or smbdPasswd field.
How severe is CVE-2018-15553?: CVE-2018-15553 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-15553 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15553?: CVE-2018-15553 affects Telus Actiontec T2200h Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15553?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-15553 published?: CVE-2018-15553 was published on 2018-08-20 and last updated on 2026-06-17.

References

http://seclists.org/fulldisclosure/2016/Aug/75

Affected products (1)

cpe:2.3:o:telus:actiontec_t2200h_firmware:t2200h-31.128l.03:*:*:*:*:*:*:*

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