CVE-2021-20680

moderate-risk
Published 2021-04-26

Cross-site scripting vulnerability in NEC Aterm devices (Aterm WG1900HP2 firmware Ver.1.3.1 and earlier, Aterm WG1900HP firmware Ver.2.5.1 and earlier, Aterm WG1800HP4 firmware Ver.1.3.1 and earlier, Aterm WG1800HP3 firmware Ver.1.5.1 and earlier, Aterm WG1200HS2 firmware Ver.2.5.0 and earlier, Aterm WG1200HP3 firmware Ver.1.3.1 and earlier, Aterm WG1200HP2 firmware Ver.2.5.0 and earlier, Aterm W1200EX firmware Ver.1.3.1 and earlier, Aterm W1200EX-MS firmware Ver.1.3.1 and earlier, Aterm WG1200HS firmware all versions Aterm WG1200HP firmware all versions Aterm WF800HP firmware all versions Aterm WF300HP2 firmware all versions Aterm WR8165N firmware all versions Aterm W500P firmware all versions, and Aterm W300P firmware all versions) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.

Do I need to act?

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0.35% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.1/10 Medium
NETWORK / LOW complexity

Affected Products (17)

Aterm Wg1900Hp2 Firmware
Aterm Wg1900Hp Firmware
Aterm Wg1800Hp4 Firmware
Aterm Wg1800Hp3 Firmware
Aterm Wg1200Hs3 Firmware
Aterm Wg1200Hs2 Firmware
Aterm Wg1200Hp3 Firmware
Aterm Wg1200Hp2 Firmware
Aterm W1200Ex Firmware
Aterm W1200Ex-Ms Firmware
Aterm Wg1200Hs Firmware
Aterm Wg1200Hp Firmware
Aterm Wf800Hp Firmware
Aterm Wf300Hp2 Firmware
Aterm Wr8165N Firmware
Aterm W500P Firmware
Aterm W300P Firmware

Affected Vendors

Nec

References (4)

Vendor Advisory https://jpn.nec.com/security-info/secinfo/nv21-008.html
Third Party Advisory https://jvn.jp/en/jp/JVN67456944/index.html
Vendor Advisory https://jpn.nec.com/security-info/secinfo/nv21-008.html
Third Party Advisory https://jvn.jp/en/jp/JVN67456944/index.html
43
/ 100
moderate-risk
Severity 23/34 · High
Exploitability 1/34 · Minimal
Exposure 19/34 · Moderate