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CVE-2020-8963

31
FAUCET Score

CVE-2020-8963 is a critical OS command injection vulnerability affecting multiple TimeTools devices, including SC7105, SC9205, SC9705, SR7110, SR9210, SR9750, SR9850, T100, T300, and T550 models. This flaw allows unauthenticated remote attackers to execute arbitrary operating system commands by injecting shell metacharacters into the 'srmodel' or 'srtime' parameters of the t3.cgi script. With a CVSS score of 9.8 (Critical), the vulnerability has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog and lacking public exploit intelligence in Metasploit, Nuclei, or ExploitDB, the CVE has garnered significant community discussion, indicating potential awareness and interest in its exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.007CPE matchmatch criteria
cpe:2.3:o:timetoolsltd:sr9850_firmware:1.0.007:*:*:*:*:*:*:*
1.0.007CPE matchmatch criteria
cpe:2.3:o:timetoolsltd:sr9750_firmware:1.0.007:*:*:*:*:*:*:*
1.0.007CPE matchmatch criteria
cpe:2.3:o:timetoolsltd:sc9705_firmware:1.0.007:*:*:*:*:*:*:*
1.0.007CPE matchmatch criteria
cpe:2.3:o:timetoolsltd:sr9210_firmware:1.0.007:*:*:*:*:*:*:*
1.0.007CPE matchmatch criteria
cpe:2.3:o:timetoolsltd:sc9205_firmware:1.0.007:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.68%
Probability of exploitation in next 30 days
EPSS Percentile
84.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0268 is in the 75th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

sku11army.blogspot.com / 2020/02/timetools-sr-sc-series-network-time.html
ExploitThird Party Advisory