CVE-2026-29642: Internal Asset Exposed to Unsafe Debug Access Level or State
Source CVE Database V5
Not known to be exploited · CVSS 7.8 High.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 20 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Until a patch is available, limit local privileged access to trusted users only and monitor for unusual behavior related to CSR operations. Avoid executing untrusted firmware or software that could induce privileged CSR operations.
Description
CVE-2026-29642 is a high-severity vulnerability affecting certain versions of the XiangShan RISC-V implementation. A local attacker with privileges to execute CSR operations or induce firmware to do so can perform crafted reads/writes to the menvcfg register. This can cause reserved WPRI bits in the xstatus register to be incorrectly set to 1, violating the RISC-V specification that these bits must not be modified by software. The vulnerability has a CVSS score of 7.8, indicating high impact on confidentiality, integrity, and availability. No patch or official remediation guidance is currently available, and no known exploits have been reported in the wild. The vulnerability specifically involves improper handling of WPRI fields during menvcfg accesses in affected XiangShan versions as of November 19, 2024.