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CVE-2020-9502

30
FAUCET Score

CVE-2020-9502 is a critical session ID predictability vulnerability affecting certain Dahua products manufactured before December 2019. An unauthenticated attacker can remotely exploit this flaw with low complexity by predicting session IDs to construct malicious data packets, leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the high CVSS score of 9.8 underscores the severe risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 2019-12CPE matchmatch criteria
cpe:2.3:o:dahuasecurity:sd6al_firmware:*:*:*:*:*:*:*:*
< 2019-12CPE matchmatch criteria
cpe:2.3:o:dahuasecurity:sd5a_firmware:*:*:*:*:*:*:*:*
< 2019-12CPE matchmatch criteria
cpe:2.3:o:dahuasecurity:sd1a_firmware:*:*:*:*:*:*:*:*
< 2019-12CPE matchmatch criteria
cpe:2.3:o:dahuasecurity:ptz1a_firmware:*:*:*:*:*:*:*:*
< 2019-12CPE matchmatch criteria
cpe:2.3:o:dahuasecurity:sd50_firmware:*:*:*:*:*:*:*:*

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
1.72%
Probability of exploitation in next 30 days
EPSS Percentile
75.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0172 is in the 63rd percentile among its peer group of 36,835 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

dahuasecurity.com / support/cybersecurity/details/777
Vendor Advisory