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Medium severity6.1NVD Advisory· Published Apr 26, 2021· Updated Jun 17, 2026

CVE-2021-20680

CVE-2021-20680

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

19
  • NEC/Aterm W1200ex Ms Firmware
    cpe:2.3:o:nec:aterm_w1200ex-ms_firmware:*:*:*:*:*:*:*:*
    Range: <=1.3.1
  • NEC/Aterm W1200ex Firmware
    cpe:2.3:o:nec:aterm_w1200ex_firmware:*:*:*:*:*:*:*:*
    Range: <=1.3.1
  • NEC/Aterm W300p Firmware
    cpe:2.3:o:nec:aterm_w300p_firmware:*:*:*:*:*:*:*:*
  • NEC/Aterm W500p Firmware
    cpe:2.3:o:nec:aterm_w500p_firmware:*:*:*:*:*:*:*:*
  • NEC/Aterm Wf300hp2 Firmware
    cpe:2.3:o:nec:aterm_wf300hp2_firmware:*:*:*:*:*:*:*:*
  • NEC/Aterm Wf800hp Firmware
    cpe:2.3:o:nec:aterm_wf800hp_firmware:*:*:*:*:*:*:*:*
  • NEC/Aterm Wg1200hp4 Firmware3 versions
    cpe:2.3:o:nec:aterm_wg1200hp2_firmware:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:nec:aterm_wg1200hp2_firmware:*:*:*:*:*:*:*:*range: <=2.5.0
    • cpe:2.3:o:nec:aterm_wg1200hs3_firmware:*:*:*:*:*:*:*:*range: <=1.1.2
    • cpe:2.3:o:nec:aterm_wg1800hp4_firmware:*:*:*:*:*:*:*:*range: <=1.3.1
  • NEC/Aterm Wx3000hp Firmware2 versions
    cpe:2.3:o:nec:aterm_wg1200hp3_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:nec:aterm_wg1200hp3_firmware:*:*:*:*:*:*:*:*range: <=1.3.1
    • cpe:2.3:o:nec:aterm_wg1200hs2_firmware:*:*:*:*:*:*:*:*range: <=2.5.0
  • NEC/Aterm Wg1200hp Firmware
    cpe:2.3:o:nec:aterm_wg1200hp_firmware:*:*:*:*:*:*:*:*
  • NEC/Aterm Wg1200hs Firmware
    cpe:2.3:o:nec:aterm_wg1200hs_firmware:*:*:*:*:*:*:*:*
  • NEC/Aterm Wg1800hp3 Firmware
    cpe:2.3:o:nec:aterm_wg1800hp3_firmware:*:*:*:*:*:*:*:*
    Range: <=1.5.1
  • NEC/Aterm WG1900HP2
    cpe:2.3:o:nec:aterm_wg1900hp2_firmware:*:*:*:*:*:*:*:*
    Range: <=1.3.1
  • NEC/Aterm Wx3600hp Firmware
    cpe:2.3:o:nec:aterm_wg1900hp_firmware:*:*:*:*:*:*:*:*
    Range: <=2.5.1
  • NEC/Aterm Wr8165n Firmware
    cpe:2.3:o:nec:aterm_wr8165n_firmware:*:*:*:*:*:*:*:*
  • NEC/Atermllm-fuzzy
    Range: Ver.1.3.1 and earlier, Ver.2.5.1 and earlier, Ver.1.3.1 and earlier, Ver.1.5.1 and earlier, Ver.2.5.0 and earlier, Ver.1.3.1 and earlier, Ver.2.5.0 and earlier, Ver.1.3.1 and earlier, Ver.1.3.1 and earlier, all versions, all versions, all versions, all versions, all versions, all versions, all versions
  • NEC Corporation/NEC Aterm devicesv5
    Range: 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

Patches

Vulnerability mechanics

References

2

News mentions

0

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