CVE-2026-7836— hextoint macro uppercase bug
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-7836
Vulnerability Information
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Vulnerability Title
hextoint macro uppercase bug
Source: NVD (National Vulnerability Database)
Vulnerability Description
An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
数值计算不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
Netatalk 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netatalk是Netatalk开源的一款软件，为 Classic Mac OS 和 macOS 在 Unix-like OS 上提供 AFP 文件服务器功能。 Netatalk 2.0.0版本至4.4.2版本存在安全漏洞，该漏洞源于hextoint宏中大写字符处理不当导致计算错误，可能导致远程经过身份验证的攻击者造成有限的数据修改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-7836
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Vendor Advisories for CVE-2026-7836 (1)
- Netatalk - Netatalk Security Advisoryvendor-advisory
Same Patch Batch · Netatalk · 2026-05-21 · 33 CVEs total
| CVE-2026-44050 | 9.9 CRITICAL | Heap buffer overflow in CNID daemon comm_rcv() |
| CVE-2026-44047 | 8.8 HIGH | SQL injection in MySQL CNID backend |
| CVE-2026-44048 | 8.8 HIGH | Stack buffer overflow via UCS-2 type confusion in convert_charset() |
| CVE-2026-44051 | 8.1 HIGH | Arbitrary file read via attacker-controlled symlink creation |
| CVE-2026-44068 | 7.6 HIGH | EA path traversal via incomplete sanitization |
| CVE-2026-44049 | 7.5 HIGH | Out-of-bounds write in convert_charset() null termination |
| CVE-2026-44055 | 7.5 HIGH | Bitwise OR logic bug enables shell injection |
| CVE-2026-44052 | 7.5 HIGH | LDAP simple-bind password exposure in log output |
| CVE-2026-44060 | 7.5 HIGH | Integer underflow in dsi_writeinit() leads to denial of service |
| CVE-2026-44062 | 7.5 HIGH | Missing o_len bounds check in pull_charset_flags() |
| CVE-2026-44053 | 7.4 HIGH | Weak cryptography in DHCAST128 UAM |
| CVE-2026-44064 | 7.1 HIGH | ASP session ID out-of-bounds access |
| CVE-2026-44066 | 7.1 HIGH | Heap out-of-bounds reads in Spotlight RPC unmarshalling |
| CVE-2026-44076 | 6.7 MEDIUM | Shell injection via volume path |
| CVE-2026-44054 | 6.5 MEDIUM | Predictable afpd session token |
| CVE-2026-44058 | 6.4 MEDIUM | Authentication bypass via admin auth user |
| CVE-2026-44056 | 6.0 MEDIUM | Stack buffer overflow in desktop.c |
| CVE-2026-44061 | 5.9 MEDIUM | DES-ECB auth with timing side channel |
| CVE-2026-44063 | 4.2 MEDIUM | LDAP filter injection |
| CVE-2026-44073 | 4.0 MEDIUM | seteuid failure ignored in auth modules |
Showing top 20 of 33 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same weakness: CWE-682
- CVE-2026-44074
Bitwise OR of errno values - CVE-2023-7346
Ledger Bitcoin App 2.1.0 Address Derivation Error via Minisc - CVE-2026-44498
ZEBRA: Block Validator Undercounts Coinbase and P2SH Sigops - CVE-2026-1229
Incorrect calculation in CIRCL secp384r1 CombinedMult - CVE-2026-24783
soroban-fixed-point-math has Incorrect Rounding and Overflow
V. Comments for CVE-2026-7836
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