How severe is CVE-2020-8964?

CVE-2020-8964 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-2020-8964 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8964?

CVE-2020-8964 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-2020-8964?

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-2020-8964 published?

CVE-2020-8964 was published on 2020-02-13 and last updated on 2026-06-17.

CVE-2020-8964

CVE-2020-8964 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-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
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 bypass authentication by placing t3axs=TiMEtOOlsj7G3xMm52wB in a t3.cgi request, aka a "hardcoded cookie."

Frequently asked questions

What is CVE-2020-8964?: 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 bypass authentication by placing t3axs=TiMEtOOlsj7G3xMm52wB in a t3.cgi request, aka a "hardcoded cookie."
How severe is CVE-2020-8964?: CVE-2020-8964 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-2020-8964 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8964?: CVE-2020-8964 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-2020-8964?: 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-2020-8964 published?: CVE-2020-8964 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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CVE-2020-8963 — Critical (CVSS 9.8): 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…

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