CVE-2023-43239: dlink dir-816_a2_firmware Out-of-bounds Write
CVSS: 9.8v3.1CriticalModified
Published 21-09-2023Last modified 24-09-2024
Vulnerability summary
CVE-2023-43239 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in dlink dir-816_a2_firmware. EPSS estimates a 13.32% chance of exploitation in the next 30 days, higher than 96.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
13.32%
0%100%
Medium · +1.08 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 21-09-2023PublishedVulnerability first disclosed.
- 24-09-2024Last modifiedVulnerability information updated.
Description
D-Link DIR-816 A2 v1.10CNB05 was discovered to contain a stack overflow via parameter flag_5G in showMACfilterMAC.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources2 sources · 8.8–9.8
- CVE.orgCNA8.8HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HDiffers
EPSS trend
Probability
13.32%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
+1.08 pp
From 12.24% on 19-09-2026
19-09-202619-10-2026
EPSS score13.32%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundFounded 0 Days
Maturity: poc
Weaknesses
CWE · root cause- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
- CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
Affected systems
Dlink1 product
- dir-816_a2_firmware1.10cnb05
1 vendor · 1 product
References
2 links- www.dlink.com/en/security-bulletin/Vendor Advisory
- github.com/peris-navince/founded-0-days/blob/main/Dlink/816/showMACfilterMAC/1.mdExploitThird Party Advisory