How severe is CVE-2020-8963?

CVE-2020-8963 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-2020-8963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8963?

CVE-2020-8963 primarily affects Timetoolsltd Sr9850 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-8963?

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-2020-8963 published?

CVE-2020-8963 was published on 2020-02-13 and last updated on 2026-06-17.

CVE-2020-8963

CVE-2020-8963 is a critical-severity vulnerability in Timetoolsltd Sr9850 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Timetoolsltd Sr9850 Firmware
Published: 2020-02-13
Last modified: 2026-06-17

Description

TimeTools SC7105 1.0.007, SC9205 1.0.007, SC9705 1.0.007, SR7110 1.0.007, SR9210 1.0.007, SR9750 1.0.007, SR9850 1.0.007, T100 1.0.003, T300 1.0.003, and T550 1.0.003 devices allow remote attackers to execute arbitrary OS commands via shell metacharacters in the t3.cgi srmodel or srtime parameter.

Frequently asked questions

What is CVE-2020-8963?: TimeTools SC7105 1.0.007, SC9205 1.0.007, SC9705 1.0.007, SR7110 1.0.007, SR9210 1.0.007, SR9750 1.0.007, SR9850 1.0.007, T100 1.0.003, T300 1.0.003, and T550 1.0.003 devices allow remote attackers to execute arbitrary OS commands via shell metacharacters in the t3.cgi srmodel or srtime parameter.
How severe is CVE-2020-8963?: CVE-2020-8963 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-2020-8963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8963?: CVE-2020-8963 primarily affects Timetoolsltd Sr9850 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-8963?: 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-2020-8963 published?: CVE-2020-8963 was published on 2020-02-13 and last updated on 2026-06-17.

References

https://sku11army.blogspot.com/2020/02/timetools-sr-sc-series-network-time.html

Affected products (10)

cpe:2.3:o:timetoolsltd:sr9850_firmware:1.0.007:*:*:*:*:*:*:*
cpe:2.3:o:timetoolsltd:sr9750_firmware:1.0.007:*:*:*:*:*:*:*
cpe:2.3:o:timetoolsltd:sc9705_firmware:1.0.007:*:*:*:*:*:*:*
cpe:2.3:o:timetoolsltd:sr9210_firmware:1.0.007:*:*:*:*:*:*:*
cpe:2.3:o:timetoolsltd:sc9205_firmware:1.0.007:*:*:*:*:*:*:*
cpe:2.3:o:timetoolsltd:sr7110_firmware:1.0.007:*:*:*:*:*:*:*
cpe:2.3:o:timetoolsltd:sc7105_firmware:1.0.007:*:*:*:*:*:*:*
cpe:2.3:o:timetoolsltd:t100_firmware:1.0.003:*:*:*:*:*:*:*
cpe:2.3:o:timetoolsltd:t300_firmware:1.0.003:*:*:*:*:*:*:*
cpe:2.3:o:timetoolsltd:t550_firmware:1.0.003:*:*:*:*:*:*:*

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