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, SR98

This week

CRITICAL 9.8REMOTEMITIGATEMITIGATEMITIGATE

CVE-2020-8964 is a critical-severity flaw (CVSS 9.8) affecting sr9850 firmware, sr9750 firmware, sc9705 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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."

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.7% (top 10%)
CISA exploited list	No
Weakness	CWE-798
Published	2020-02-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: timetoolsltd

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-02-13 03:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

timetoolsltd sr9850 firmware MITIGATE

Affected: 1.0.007

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.007

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

timetoolsltd sr9750 firmware MITIGATE

Affected: 1.0.007

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.007

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

timetoolsltd sc9705 firmware MITIGATE

Affected: 1.0.007

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.007

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

timetoolsltd sr9210 firmware MITIGATE

Affected: 1.0.007

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.007

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

timetoolsltd sc9205 firmware MITIGATE

Affected: 1.0.007

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.007

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

timetoolsltd sr7110 firmware MITIGATE

Affected: 1.0.007

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.007

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-8964?

sr9850 firmware: mitigate or apply the listed mitigation; sr9750 firmware: mitigate or apply the listed mitigation; sc9705 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-8964 being exploited?

CVE-2020-8964 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-8964 affect?

CVE-2020-8964 affects sr9850 firmware, sr9750 firmware, sc9705 firmware. Severity is 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 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=

How urgent is CVE-2020-8964?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-8963 CRITICAL 9.8 MITIGATE MITIGATE 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, SR98

References

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