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Fencer Vulns
medium 4.8

CVE-2024-21798 json

ELECOM wireless LAN routers contain a cross-site scripting vulnerability.

published 2024-02-28 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-19411

cvss
4.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

ELECOM wireless LAN routers contain a cross-site scripting vulnerability. Assume that a malicious administrative user configures the affected product with specially crafted content. When another administrative user logs in and operates the product, an arbitrary script may be executed on the web browser. Note that WMC-X1800GST-B is also included in e-Mesh Starter Kit "WMC-2LX-B".

Patch / fix

  • elecom wrc-1167gs2-b_firmware 1.73
  • elecom wrc-1167gs2h-b_firmware 1.73
  • elecom wrc-1167gst2_firmware 1.34
  • elecom wrc-2533gs2-b_firmware 1.68
  • elecom wrc-2533gs2-w_firmware 1.68
  • elecom wrc-2533gs2v-b_firmware 1.68
  • elecom wrc-2533gst2_firmware 1.31
  • elecom wrc-x3200gst3-b_firmware 1.27
  • elecom wrc-g01-w_firmware 1.26
  • elecom wmc-x1800gst-b_firmware 1.42

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.29% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 4.8 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

  • ELECOM CO.,LTD. WRC-1167GS2-B
  • ELECOM CO.,LTD. WRC-1167GS2H-B
  • ELECOM CO.,LTD. WRC-1167GST2
  • ELECOM CO.,LTD. WRC-2533GS2-B
  • ELECOM CO.,LTD. WRC-2533GS2-W
  • ELECOM CO.,LTD. WRC-2533GS2V-B
  • ELECOM CO.,LTD. WRC-2533GST2
  • ELECOM CO.,LTD. WRC-X3200GST3-B
  • ELECOM CO.,LTD. WRC-G01-W
  • ELECOM CO.,LTD. WMC-X1800GST-B

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.