CVE-2020-9034

Exp

Symmetricom SyncServer S100 2.90.70.3, S200 1.30, S250 1.25, S300 2.65.0, and S350 2.80.1 devices mishandle session validation, leading to unauthenticated creation, modification, or elimination of users.

Published: 2020-02-17 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-9034 is rated High Exploit Risk (70.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.70%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-9034

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-9034

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.48% 0.70% +0.22%
2 2025-11-18 0.70% 0.48% -0.22%
3 2025-05-10 — 0.70% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-9034

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-9034

Affected software / configurations for CVE-2020-9034

Vendor Product Version Raw CPE
microchip syncserver_s100_firmware 2.90.70.3 cpe:2.3:o:microchip:syncserver_s100_firmware:2.90.70.3:*:*:*:*:*:*:*
microchip syncserver_s200_firmware 1.30 cpe:2.3:o:microchip:syncserver_s200_firmware:1.30:*:*:*:*:*:*:*
microchip syncserver_s250_firmware 1.25 cpe:2.3:o:microchip:syncserver_s250_firmware:1.25:*:*:*:*:*:*:*
microchip syncserver_s300_firmware 2.65.0 cpe:2.3:o:microchip:syncserver_s300_firmware:2.65.0:*:*:*:*:*:*:*
microchip syncserver_s350_firmware 2.80.1 cpe:2.3:o:microchip:syncserver_s350_firmware:2.80.1:*:*:*:*:*:*:*

References for CVE-2020-9034

cvelogic Threat Intelligence