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Fencer Intel
medium 6.4

CVE-2021-35032 json

A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local user to execute arbi…

published 4y ago modified 4mo ago also EUVD-2021-21679

cvss
6.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local user to execute arbitrary OS commands via a crafted function call.

Patch / fix

  • zyxel gs1900-8_firmware 2.70\(aahh.0\)-20211208
  • zyxel gs1900-8hp_firmware 2.70\(aahi.0\)-20211208
  • zyxel gs1900-10hp_firmware 2.70\(aazi.0\)-20211208
  • zyxel gs1900-16_firmware 2.70\(aahj.0\)-20211208
  • zyxel gs1900-24e_firmware 2.70\(aahk.0\)-20211208
  • zyxel gs1900-24ep_firmware 2.70\(abto.0\)-20211208
  • zyxel gs1900-24_firmware 2.70\(aahl.0\)-20211208
  • zyxel gs1900-24hp_firmware 2.70\(aahm.0\)-20211208
  • zyxel gs1900-24hpv2_firmware 2.70\(aatp.0\)-20211208
  • zyxel gs1900-48_firmware 2.70\(aahn.0\)-20211208
  • zyxel gs1900-48hp_firmware 2.70\(aaho.0\)-20211208
  • zyxel gs1900-48hpv2_firmware 2.70\(abtq.0\)-20211208

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Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • Zyxel GS1900 series firmware

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Intel 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.