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CVE-2021-20622

19
FAUCET Score

CVE-2021-20622 describes a cross-site scripting (XSS) vulnerability affecting Aterm WG2600HP firmware versions 1.0.2 and earlier, and Aterm WG2600HP2 firmware versions 1.0.2 and earlier. This medium-severity vulnerability (CVSS 6.1) allows remote attackers to inject arbitrary scripts due to a lack of proper input sanitization. While the attack complexity is low and no authentication is required, user interaction is necessary for successful exploitation, potentially leading to limited impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.0.2CPE matchmatch criteria
cpe:2.3:o:aterm:wg2600hp_firmware:*:*:*:*:*:*:*:*
<= 1.0.2CPE matchmatch criteria
cpe:2.3:o:aterm:wg2600hp2_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.04%
Probability of exploitation in next 30 days
EPSS Percentile
60.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0104 is in the 73rd percentile among its peer group of 26,220 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jpn.nec.com / security-info/secinfo/nv21-005.html
Third Party Advisory
jvn.jp / en/jp/JVN38248512/index.html
Third Party Advisory
aterm.jp / support/tech/2019/0328.html
PatchVendor Advisory