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CVE-2020-5524

22
FAUCET Score

CVE-2020-5524 is a critical vulnerability affecting specific firmware versions of NEC Aterm WF1200C, WG1200CR, and WG2600HS routers. An attacker on the same network segment can exploit a flaw in the UPnP function to execute arbitrary OS commands with root privileges. This vulnerability carries a high CVSS score of 8.8, indicating a severe risk due to its low attack complexity and complete compromise potential (confidentiality, integrity, and availability). While no public exploits or active exploitation have been observed, and community discussion is minimal, the potential for a local attacker to gain full control of affected devices is significant.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.2CPE matchmatch criteria
cpe:2.3:o:nec:aterm_wg2600hs_firmware:*:*:*:*:*:*:*:*
<= 1.2.1CPE matchmatch criteria
cpe:2.3:o:nec:aterm_wf1200c_firmware:*:*:*:*:*:*:*:*
<= 1.2.1CPE matchmatch criteria
cpe:2.3:o:nec:aterm_wg1200cr_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.02%
Probability of exploitation in next 30 days
EPSS Percentile
59.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0102 is in the 74th percentile among its peer group of 1,875 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/jp/JVN25766797
Third Party Advisory
jpn.nec.com / security-info/secinfo/nv20-003.html
Not ApplicableThird Party Advisory
jvn.jp / en/jp/JVN49410695/index.html
Not ApplicableThird Party Advisory