HOMEVULNERABILITIESCVE-2026-2703
LOW

CVE-2026-2703

CWE-189Published: February 19, 2026· Updated: Feb 19, 2026

3.3
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:2.0th

Official Description

A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::decode_base64 of the file source/detail/cryptography/base64.cpp of the component Encrypted XLSX File Parser. Executing a manipulation can lead to off-by-one. The attack requires local access. The exploit has been made available to the public and could be used for attacks. This patch is called f2d7bf494e5c52706843cf7eb9892821bffb0734. Applying a patch is advised to resolve this issue.

NVD Source

Technical Analysis

CVE-2026-2703 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (7)

→
https://github.com/oneafter/0128/blob/main/xl1/repro
→
https://github.com/xlnt-community/xlnt/
→
https://github.com/xlnt-community/xlnt/commit/f2d7bf494e5c52706843cf7eb9892821bffb0734
→
https://github.com/xlnt-community/xlnt/issues/137
→
https://vuldb.com/?ctiid.346649
→
https://vuldb.com/?id.346649
→
https://vuldb.com/?submit.754377

Quick Facts

CVE IDCVE-2026-2703
CVSS Score3.3 / 10
SeverityLOW
WeaknessCWE-189
CISA KEVNo
EPSS (30d)0.01%
PublishedFeb 19, 2026

Related CVEs (CWE-189)

CVE-2026-7736
7.5
CVE-2026-7598
7.3
CVE-2026-3284
5.5
CVE-2026-3707
5.3
CVE-2026-5476
4.6
CVE-2026-4985
4.3

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-2703 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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