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Fencer Vulns
high 7.5

CVE-2022-31482 json

Denial-of-Service via internal structure overflow

published 2022-06-06 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-52942

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

An unauthenticated attacker can send a specially crafted unauthenticated HTTP request 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 1.29. The overflowed data leads to segmentation fault and ultimately a denial-of-service condition, causing the device to reboot. The impact of this vulnerability is that an unauthenticated attacker could leverage this flaw to cause the target device to become unresponsive. An attacker could automate this attack to achieve persistent DoS, effectively rendering the target controller useless.

Patch / fix

  • LenelS2 LNL-X2210 1.29
  • LenelS2 LNL-X2220 1.29
  • LenelS2 LNL-X3300 1.29
  • LenelS2 LNL-X4420 1.29
  • LenelS2 LNL-4420 1.29
  • LenelS2 S2-LP-1501 1.29
  • LenelS2 S2-LP-1502 1.29
  • LenelS2 S2-LP-2500 1.29
  • LenelS2 S2-LP-4502 1.29
  • HID Mercury LP1501 1.29
  • HID Mercury LP1502 1.29
  • HID Mercury LP2500 1.29
  • HID Mercury LP4502 1.29
  • HID Mercury EP4502 1.29

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 7.5

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

1.06% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

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.