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S6700 Firmware CVE-2020-1810

MEDIUM
Use of a Broken or Risky Cryptographic Algorithm (CWE-327)
2020-01-09 psirt@huawei.com
Information Disclosure Microsoft Huawei S6700 Firmware S5700 Firmware Cloudengine 12800 Firmware
5.3
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-327
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Approved algorithm selection
Impact

CVSS score of 5.3 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.5% exploitation probability (EPSS)

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AnalysisAI

There is a weak algorithm vulnerability in some Huawei products. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-327. There is a weak algorithm vulnerability in some Huawei products. The affected products use the RSA algorithm in the SSL key exchange algorithm which have been considered as a weak algorithm. Attackers may exploit this vulnerability to leak some information. Affected products include: Huawei Cloudengine 12800 Firmware, Huawei S5700 Firmware, Huawei S6700 Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

DescriptionNVD

There is a weak algorithm vulnerability in some Huawei products. The affected products use the RSA algorithm in the SSL key exchange algorithm which have been considered as a weak algorithm. Attackers may exploit this vulnerability to leak some information.

Threat Intelligence Overview

EPSS Score
0.5%
Top 64% exploitable
Data Quality
2 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.5%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:o:huawei:cloudengine_12800_firmware:v100r003c00spc600:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v100r003c10spc100:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v100r005c00spc200:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v100r005c00spc300:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v100r005c10hp0001:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v100r005c10spc100:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v100r005c10spc200:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v100r006c00:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r001c00:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r002c01:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r002c10:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r002c20:*:*:*:*:*:*:*
cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r005c10:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5700_firmware:v200r005c00spc500:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5700_firmware:v200r005c03:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5700_firmware:v200r006c00spc100:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5700_firmware:v200r006c00spc300:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5700_firmware:v200r006c00spc500:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5700_firmware:v200r007c00spc100:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5700_firmware:v200r007c00spc500:*:*:*:*:*:*:*
+ 2 more

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Same weakness CWE-327 – Use of a Broken or Risky Cryptographic Algorithm

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CVE-2022-3365 CRITICAL POC
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CVE-2014-8687 CRITICAL POC
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CVE-2023-34039 CRITICAL POC
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CVE-2025-2539 HIGH POC
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CVE-2017-9466 CRITICAL POC
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CVE-2023-5347 CRITICAL POC
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Same technique Information Disclosure

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CVE-2019-2725 CRITICAL POC
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CVE-2021-34523 CRITICAL POC
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CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2025-68613 HIGH POC
8.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

References

Advisories & patches
ADVISORY https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200108-01-rsa-en

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