CVE-2025-13445: tenda ac21_firmware
CVSS: 9.8v3.1CriticalModified
Published 20-11-2025Last modified 24-02-2026
Vulnerability summary
CVE-2025-13445 is a critical (CVSS 9.8) vulnerability in tenda ac21_firmware. EPSS estimates a 4.21% chance of exploitation in the next 30 days, higher than 90.9% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
4.21%
0%100%
Low · +0.33 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 20-11-2025PublishedVulnerability first disclosed.
- 24-02-2026Last modifiedVulnerability information updated.
Description
A flaw has been found in Tenda AC21 16.03.08.16. This affects an unknown part of the file /goform/SetIpMacBind. Executing a manipulation of the argument list can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used.
CVSS metrics
7 scores · 2 sources · 4 versionsHigh 8.7Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:PSources2 sources · 7.4–8.7
- NVDNIST7.4HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XDiffers
Critical 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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:RDiffers
High 8.8Preferred score · CVE.org (CNA)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:RSourcesSingle source
High 9.0Preferred score · CVE.org (CNA)
AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:URSourcesAll 2 agree
- NVDNIST9.0HighAV:N/AC:L/Au:S/C:C/I:C/A:C
EPSS trend
Probability
4.21%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
+0.33 pp
From 3.88% on 21-09-2026
21-09-202621-10-2026
EPSS score4.21%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundMy Vuln 2
Maturity: poc
Weaknesses
CWE · root cause- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
- 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
Tenda1 product
- ac21_firmware16.03.08.16
1 vendor · 1 product
References
5 links- www.tenda.com.cnProduct