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CVE-2020-8962

28
FAUCET Score

CVE-2020-8962 is a critical stack-based buffer overflow vulnerability affecting D-Link DIR-842 REVC routers with firmware v3.13B09 HOTFIX. This flaw stems from the insecure use of strcpy when processing the LOGINPASSWORD field in POST requests to the /MTFWU endpoint. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity, allowing for complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, nor are there publicly available exploit modules in common frameworks like Metasploit or Nuclei, and it has garnered minimal community discussion or media attention.

Impacted Technologies

VendorProductVersion(s)CPE
3.13b09CPE matchmatch criteria
cpe:2.3:o:dlink:dir-842_firmware:3.13b09:*:*:*:*:*:*:*

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
1.80%
Probability of exploitation in next 30 days
EPSS Percentile
76.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0180 is in the 64th percentile among its peer group of 36,829 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

ctrsec.io / index.php/2020/02/12/cve-2020-8962-d-link-dir-842-stack-based-buffer-overflow
ExploitThird Party Advisory