Vulnerability · CVE-2026-79405
Improper Input Validation in Modem Firmware
Published Nov 4, 2026 · catalog updated Nov 4, 2026 · Unisoc (Shanghai) Technologies Co., Ltd. Modem
Last checked Nov 6, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-79405. EPSS is 0.46%. Act only if a listed version of Unisoc (Shanghai) Technologies Co., Ltd. Modem is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.46%
- Remediation
- Advisory link
- Affected products
- vendor Unisoc (Shanghai) Technologies Co., Ltd. Modem
In Modem Firmware, there is a possible system crash due to improper input validation of dedicated PUCCH configuration. This could lead to remote denial of service with no additional execution privileges needed.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Unisoc (Shanghai) Technologies Co., Ltd. Modemversion unspecified
How to fix CVE-2026-79405
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-79405. EPSS is 0.46%. Act only if a listed version of Unisoc (Shanghai) Technologies Co., Ltd. Modem is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-20: Improper Input Validation. EPSS 0.46%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Nov 4, 2026 · Tenable CVE Database
Detected
In Modem Firmware, there is a possible system crash due to improper input validation of dedicated PUCCH configuration. This could lead to remote denial of service with no additional execution privileges needed.
Nov 4, 2026 · CVE.org
Updated
In Modem Firmware, there is a possible system crash due to improper input validation of dedicated PUCCH configuration. This could lead to remote denial of service with no additional execution privileges needed.
Sources
- CVE.orgVulnerability recordCVE-2026-79405
In Modem Firmware, there is a possible system crash due to improper input validation of dedicated PUCCH configuration. This could lead to remote denial of service with no additional execution privileges needed.
cve.org - FIRST EPSSExploitation probabilityCVE-2026-79405
30-day exploitation probability 0.46%
first.org - Tenable CVE DatabaseVulnerability recordCVE-2026-79405
Transient DOS when processing a malformed NR RRC configuration message due to improper input validation.
tenable.com
References
Freshness
Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- Tenable CVE DatabaseNov 6, 2026
- FIRST EPSSNov 5, 2026
- CVE.orgNov 5, 2026