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Fencer Vulns
critical 10.0

CVE-2022-31481 json

Remote Code Execution via buffer overflow in firmware update process

published 2022-06-06 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-52941

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

An unauthenticated attacker can send a specially crafted update file to the device that can overflow a buffer. This vulnerability impacts products based on HID Mercury Intelligent Controllers LP1501, LP1502, LP2500, LP4502, and EP4502 which contain firmware versions prior to 1.302 for the LP series and 1.296 for the EP series. The overflowed data can allow the attacker to manipulate the “normal” code execution to that of their choosing. An attacker with this level of access on the device can monitor all communications sent to and from this device, modify onboard relays, change configuration files, or cause the device to become unstable.

Patch / fix

  • LenelS2 LNL-X2210 1.302
  • LenelS2 LNL-X2220 1.302
  • LenelS2 LNL-X3300 1.302
  • LenelS2 LNL-X4420 1.302
  • LenelS2 LNL-4420 1.296
  • LenelS2 S2-LP-1501 1.302
  • LenelS2 S2-LP-1502 1.302
  • LenelS2 S2-LP-2500 1.302
  • LenelS2 S2-LP-4502 1.302
  • HID Mercury LP1501 1.302
  • HID Mercury LP1502 1.302
  • HID Mercury LP2500 1.302
  • HID Mercury LP4502 1.302
  • HID Mercury EP4502 1.296

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-22-153-01 updated cvss 10.0

Carrier LenelS2 HID Mercury access panels

  • Carrier LenelS2 HID Mercury access panels sold by LenelS2 LNL-X2210, LNL-X2220, LNL-X3300, LNL-X4420
    affected: mitigation “Carrier recommends updating these access panels to the most current released firmware via the LenelS2 Partner Center. Please contact a Carrier support channel partner for instructions.” corporate.carrier.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.64% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • LenelS2 LNL-X2210
  • LenelS2 LNL-X2220
  • LenelS2 LNL-X3300
  • LenelS2 LNL-X4420
  • LenelS2 LNL-4420
  • LenelS2 S2-LP-1501
  • LenelS2 S2-LP-1502
  • LenelS2 S2-LP-2500
  • LenelS2 S2-LP-4502
  • HID Mercury LP1501
  • HID Mercury LP1502
  • HID Mercury LP2500
  • HID Mercury LP4502
  • HID Mercury EP4502

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

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.