Skip to content
Fencer Intel
high 7.5

CVE-2021-31156 json

Allied Telesis AT-S115 1.2.0 devices before 1.00.024 with Boot Loader 1.00.006 allow Directory Traversal to achieve partial access to data.

published 2y ago modified 4mo ago also EUVD-2021-18070

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

Allied Telesis AT-S115 1.2.0 devices before 1.00.024 with Boot Loader 1.00.006 allow Directory Traversal to achieve partial access to data.

Patch / fix

  • allied_telesis_at s115_1.2.0 1.00.024_with_boot_loader_1.00.006

Is CVE-2021-31156 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
2y ago

Exploit prediction

0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • allied_telesis_at s115_1.2.0

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

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.