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CVE-2021-45906

20
FAUCET Score

CVE-2021-45906 describes a Cross-Site Scripting (XSS) vulnerability in OpenWrt version 21.02.1, specifically within the NAT Rules Name screen. This medium-severity vulnerability (CVSS 5.4) allows an attacker to inject malicious scripts, potentially leading to client-side attacks, though it requires user interaction and authenticated access. There is currently no evidence of active exploitation, and no public exploit code or significant community discussion has been observed.

Impacted Technologies

VendorProductVersion(s)CPE
21.02.1CPE matchmatch criteria
cpe:2.3:o:openwrt:openwrt:21.02.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.52%
Probability of exploitation in next 30 days
EPSS Percentile
40.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0052 is in the 63rd percentile among its peer group of 15,239 CVEs.

Social Chatter

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

Remediation

Remediation records are not available for this CVE.

References

bugs.openwrt.org / index.php
ExploitIssue TrackingVendor Advisory