D-Link DIR-605L Captcha Handling Buffer Overflow
Published Jul 31, 2025
9.3
CRITICALCVSS 4.0
EPSS 4.44%
Description
A stack-based buffer overflow vulnerability exists in D-Link DIR-605L Wireless N300 Cloud Router firmware versions 1.12 and 1.13 via the getAuthCode() function. The flaw arises from unsafe usage of sprintf() when processing user-supplied CAPTCHA data via the FILECODE parameter in /goform/formLogin. A remote unauthenticated attacker can exploit this to execute arbitrary code with root privileges on the device.
Affected products
-
- Version 1.12StatusaffectedConstraints<=1.13
- Version
- ≥ 1.12 · ≤ 1.13
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Jul 31, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.44% (0.04443) | 91.10th | v5 (v2026.06.15) |
| Sep 20, 2026 | 4.41% (0.04411) | 90.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.96% (0.02958) | 85.37th | v5 (v2026.06.15) |
| May 27, 2026 | 71.25% (0.71246) | 98.73th | v4 (v2025.03.14) |
| Apr 16, 2026 | 59.24% (0.59237) | 98.24th | v4 (v2025.03.14) |
| Dec 27, 2025 | 54.57% (0.54574) | 97.93th | v4 (v2025.03.14) |
| Nov 30, 2025 | 67.42% (0.67421) | 98.49th | v4 (v2025.03.14) |
| Oct 8, 2025 | 59.92% (0.59924) | 98.16th | v4 (v2025.03.14) |
| Aug 1, 2025 | 0.53% (0.00525) | 66.20th | v4 (v2025.03.14) |
References (5)
- https://forums.dlink.com/index.php?topic=51923.0 Issue Tracking
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/dlink_dir605l_captcha_bof.rb exploit
- https://web.archive.org/web/20121012062554/http://www.devttys0.com/2012/10/exploiting-a-mips-stack-overflow/ technical-descriptionexploitThird Party Advisory
- https://www.exploit-db.com/exploits/29127 exploit
- https://www.vulncheck.com/advisories/dlink-dir605l-captcha-handling-stack-based-buffer-overflow third-party-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://forums.dlink.com/index.php?topic=51923.0 | Issue Tracking | |
| https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/dlink_dir605l_captcha_bof.rb | exploit | |
| https://web.archive.org/web/20121012062554/http://www.devttys0.com/2012/10/exploiting-a-mips-stack-overflow/ | technical-descriptionexploitThird Party Advisory | |
| https://www.exploit-db.com/exploits/29127 | exploit | |
| https://www.vulncheck.com/advisories/dlink-dir605l-captcha-handling-stack-based-buffer-overflow | third-party-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.